@Test
public void testPropertyChange() throws Exception {
BlobStoreConfigurationSource source = new BlobStoreConfigurationSource(ctx);
FixedDelayPollingScheduler scheduler = new FixedDelayPollingScheduler(0, 1000, false);
DynamicConfiguration dynamicConfig = new DynamicConfiguration(source, scheduler);
ConfigurationManager.loadPropertiesFromConfiguration(dynamicConfig);
DynamicStringProperty test1 =
DynamicPropertyFactory.getInstance().getStringProperty("test1", "");
DynamicStringProperty test2 =
DynamicPropertyFactory.getInstance().getStringProperty("test2", "");
DynamicStringProperty test3 =
DynamicPropertyFactory.getInstance().getStringProperty("test3", "");
assertEquals("val1", test1.get());
assertEquals("val2", test2.get());
assertEquals("val3", test3.get());
update();
Thread.sleep(1000);
assertEquals("vala", test1.get());
assertEquals("valb", test2.get());
assertEquals("valc", test3.get());
}
@Override
public Server chooseServer(Object key) {
if (!ENABLED.get() || getLoadBalancerStats().getAvailableZones().size() <= 1) {
logger.debug("Zone aware logic disabled or there is only one zone");
return super.chooseServer(key);
}
Server server = null;
try {
LoadBalancerStats lbStats = getLoadBalancerStats();
Map<String, ZoneSnapshot> zoneSnapshot = ZoneAvoidanceRule.createSnapshot(lbStats);
logger.debug("Zone snapshots: {}", zoneSnapshot);
if (triggeringLoad == null) {
triggeringLoad =
DynamicPropertyFactory.getInstance()
.getDoubleProperty(
"ZoneAwareNIWSDiscoveryLoadBalancer."
+ this.getName()
+ ".triggeringLoadPerServerThreshold",
0.2d);
}
if (triggeringBlackoutPercentage == null) {
triggeringBlackoutPercentage =
DynamicPropertyFactory.getInstance()
.getDoubleProperty(
"ZoneAwareNIWSDiscoveryLoadBalancer."
+ this.getName()
+ ".avoidZoneWithBlackoutPercetage",
0.99999d);
}
Set<String> availableZones =
ZoneAvoidanceRule.getAvailableZones(
zoneSnapshot, triggeringLoad.get(), triggeringBlackoutPercentage.get());
logger.debug("Available zones: {}", availableZones);
if (availableZones != null && availableZones.size() < zoneSnapshot.keySet().size()) {
String zone = ZoneAvoidanceRule.randomChooseZone(zoneSnapshot, availableZones);
logger.debug("Zone chosen: {}", zone);
if (zone != null) {
BaseLoadBalancer zoneLoadBalancer = getLoadBalancer(zone);
server = zoneLoadBalancer.chooseServer(key);
}
}
} catch (Throwable e) {
logger.error("Unexpected exception when choosing server using zone aware logic", e);
}
if (server != null) {
return server;
} else {
logger.debug("Zone avoidance logic is not invoked.");
return super.chooseServer(key);
}
}
public RibbonCommand(
String commandKey,
RestClient restClient,
HttpClientRequest.Verb verb,
String uri,
MultivaluedMap<String, String> headers,
MultivaluedMap<String, String> params,
InputStream requestEntity)
throws URISyntaxException {
super(
Setter.withGroupKey(HystrixCommandGroupKey.Factory.asKey(commandKey))
.andCommandPropertiesDefaults(
// we want to default to semaphore-isolation since this wraps
// 2 others commands that are already thread isolated
HystrixCommandProperties.Setter()
.withExecutionIsolationStrategy(
HystrixCommandProperties.ExecutionIsolationStrategy.SEMAPHORE)
.withExecutionIsolationSemaphoreMaxConcurrentRequests(
DynamicPropertyFactory.getInstance()
.getIntProperty(
ZuulConstants.ZUUL_EUREKA + commandKey + ".semaphore.maxSemaphores",
100)
.get())));
this.restClient = restClient;
this.verb = verb;
this.uri = new URI(uri);
this.headers = headers;
this.params = params;
this.requestEntity = requestEntity;
}
private static Object getPluginImplementationViaArchaius(Class<?> pluginClass) {
String classSimpleName = pluginClass.getSimpleName();
// Check Archaius for plugin class.
String propertyName = "hystrix.plugin." + classSimpleName + ".implementation";
String implementingClass =
DynamicPropertyFactory.getInstance().getStringProperty(propertyName, null).get();
if (implementingClass != null) {
try {
Class<?> cls = Class.forName(implementingClass);
// narrow the scope (cast) to the type we're expecting
cls = cls.asSubclass(pluginClass);
return cls.newInstance();
} catch (ClassCastException e) {
throw new RuntimeException(
classSimpleName
+ " implementation is not an instance of "
+ classSimpleName
+ ": "
+ implementingClass);
} catch (ClassNotFoundException e) {
throw new RuntimeException(
classSimpleName + " implementation class not found: " + implementingClass, e);
} catch (InstantiationException e) {
throw new RuntimeException(
classSimpleName + " implementation not able to be instantiated: " + implementingClass,
e);
} catch (IllegalAccessException e) {
throw new RuntimeException(
classSimpleName + " implementation not able to be accessed: " + implementingClass, e);
}
} else {
return null;
}
}
/**
* Constructor
*
* @param serviceName the service cluster name
* @param myAvailabilityZone the availability zone of the server running the load balancer
* @param metricRegistry the registry for collected metrics
*/
public ZoneAwareLoadBalancer(
String serviceName, String myAvailabilityZone, MetricRegistry metricRegistry) {
Preconditions.checkArgument(
!Strings.isNullOrEmpty(serviceName), "'serviceName' cannot be null or empty.");
Preconditions.checkArgument(
!Strings.isNullOrEmpty(myAvailabilityZone),
"'myAvailabilityZone' cannot be null or empty.");
this.serviceName = serviceName;
this.myLocation = new Location(myAvailabilityZone);
this.locations =
CacheBuilder.newBuilder()
.expireAfterAccess(5, TimeUnit.MINUTES)
.build(
new CacheLoader<ServerStats, Location>() {
@Override
public Location load(ServerStats key) throws Exception {
return getLocationFromServer(key);
}
});
this.propMaxRequestsPerSecond =
DynamicPropertyFactory.getInstance()
.getDoubleProperty("janus.serviceName." + serviceName + ".maxRequestsPerSecond", 100);
this.propEscapeAreaThreshold =
DynamicPropertyFactory.getInstance()
.getDoubleProperty("janus.serviceName." + serviceName + ".escapeAreaThreshold", 0.9);
this.propEscapeRegionThreshold =
DynamicPropertyFactory.getInstance()
.getDoubleProperty("janus.serviceName." + serviceName + ".escapeRegionThreshold", 0.9);
this.propEscapeAvailabilityThreshold =
DynamicPropertyFactory.getInstance()
.getDoubleProperty(
"janus.serviceName." + serviceName + ".escapeAvailabilityThreshold", 0.9);
this.metricRegistry = metricRegistry;
}
/** Servlet that writes SSE JSON every time a request is made */
public class HystrixRequestEventsSseServlet extends HystrixSampleSseServlet {
private static final long serialVersionUID = 6389353893099737870L;
/* used to track number of connections and throttle */
private static AtomicInteger concurrentConnections = new AtomicInteger(0);
private static DynamicIntProperty maxConcurrentConnections =
DynamicPropertyFactory.getInstance()
.getIntProperty("hystrix.config.stream.maxConcurrentConnections", 5);
public HystrixRequestEventsSseServlet() {
this(
HystrixRequestEventsStream.getInstance().observe(),
DEFAULT_PAUSE_POLLER_THREAD_DELAY_IN_MS);
}
/* package-private */ HystrixRequestEventsSseServlet(
Observable<HystrixRequestEvents> sampleStream, int pausePollerThreadDelayInMs) {
super(
sampleStream.map(
new Func1<HystrixRequestEvents, String>() {
@Override
public String call(HystrixRequestEvents requestEvents) {
return SerialHystrixRequestEvents.toJsonString(requestEvents);
}
}),
pausePollerThreadDelayInMs);
}
@Override
protected int getMaxNumberConcurrentConnectionsAllowed() {
return maxConcurrentConnections.get();
}
@Override
protected int getNumberCurrentConnections() {
return concurrentConnections.get();
}
@Override
protected int incrementAndGetCurrentConcurrentConnections() {
return concurrentConnections.incrementAndGet();
}
@Override
protected void decrementCurrentConcurrentConnections() {
concurrentConnections.decrementAndGet();
}
}
protected void setPropertyInternal(final String propName, Object value) {
String stringValue = (value == null) ? "" : String.valueOf(value);
properties.put(propName, stringValue);
if (!enableDynamicProperties) {
return;
}
String configKey = getConfigKey(propName);
final DynamicStringProperty prop =
DynamicPropertyFactory.getInstance().getStringProperty(configKey, null);
Runnable callback =
new Runnable() {
@Override
public void run() {
String value = prop.get();
if (value != null) {
properties.put(propName, value);
} else {
properties.remove(propName);
}
}
// equals and hashcode needed
// since this is anonymous object is later used as a set key
@Override
public boolean equals(Object other) {
if (other == null) {
return false;
}
if (getClass() == other.getClass()) {
return toString().equals(other.toString());
}
return false;
}
@Override
public String toString() {
return propName;
}
@Override
public int hashCode() {
return propName.hashCode();
}
};
prop.addCallback(callback);
dynamicProperties.put(propName, prop);
}
/**
* Convert <code>VIPAddress</code> by substituting environment variables if necessary.
*
* @param vipAddressMacro the macro for which the interpolation needs to be made.
* @return a string representing the final <code>VIPAddress</code> after substitution.
*/
private static String resolveDeploymentContextBasedVipAddresses(String vipAddressMacro) {
String result = vipAddressMacro;
if (vipAddressMacro == null) {
return null;
}
Matcher matcher = VIP_ATTRIBUTES_PATTERN.matcher(result);
while (matcher.find()) {
String key = matcher.group(1);
String value = DynamicPropertyFactory.getInstance().getStringProperty(key, "").get();
logger.debug("att:" + matcher.group());
logger.debug(", att key:" + key);
logger.debug(", att value:" + value);
logger.debug("");
result = result.replaceAll("\\$\\{" + key + "\\}", value);
matcher = VIP_ATTRIBUTES_PATTERN.matcher(result);
}
return result;
}
@CommonsLog
public class SimpleHostRoutingFilter extends ZuulFilter {
private static final DynamicIntProperty SOCKET_TIMEOUT =
DynamicPropertyFactory.getInstance()
.getIntProperty(ZuulConstants.ZUUL_HOST_SOCKET_TIMEOUT_MILLIS, 10000);
private static final DynamicIntProperty CONNECTION_TIMEOUT =
DynamicPropertyFactory.getInstance()
.getIntProperty(ZuulConstants.ZUUL_HOST_CONNECT_TIMEOUT_MILLIS, 2000);
private final Timer connectionManagerTimer =
new Timer("SimpleHostRoutingFilter.connectionManagerTimer", true);
private ProxyRequestHelper helper;
private PoolingHttpClientConnectionManager connectionManager;
private CloseableHttpClient httpClient;
private final Runnable clientloader =
new Runnable() {
@Override
public void run() {
try {
httpClient.close();
} catch (IOException ex) {
log.error("error closing client", ex);
}
httpClient = newClient();
}
};
public SimpleHostRoutingFilter() {
this(new ProxyRequestHelper());
}
public SimpleHostRoutingFilter(ProxyRequestHelper helper) {
this.helper = helper;
}
@PostConstruct
private void initialize() {
this.httpClient = newClient();
SOCKET_TIMEOUT.addCallback(clientloader);
CONNECTION_TIMEOUT.addCallback(clientloader);
connectionManagerTimer.schedule(
new TimerTask() {
@Override
public void run() {
if (connectionManager == null) {
return;
}
connectionManager.closeExpiredConnections();
}
},
30000,
5000);
}
@PreDestroy
public void stop() {
connectionManagerTimer.cancel();
}
@Override
public String filterType() {
return "route";
}
@Override
public int filterOrder() {
return 100;
}
@Override
public boolean shouldFilter() {
return RequestContext.getCurrentContext().getRouteHost() != null
&& RequestContext.getCurrentContext().sendZuulResponse();
}
@Override
public Object run() {
RequestContext context = RequestContext.getCurrentContext();
HttpServletRequest request = context.getRequest();
MultiValueMap<String, String> headers = this.helper.buildZuulRequestHeaders(request);
MultiValueMap<String, String> params = this.helper.buildZuulRequestQueryParams(request);
String verb = getVerb(request);
InputStream requestEntity = getRequestBody(request);
String uri = this.helper.buildZuulRequestURI(request);
try {
HttpResponse response =
forward(httpClient, verb, uri, request, headers, params, requestEntity);
setResponse(response);
} catch (Exception ex) {
context.set("error.status_code", HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
context.set("error.exception", ex);
}
return null;
}
protected PoolingHttpClientConnectionManager newConnectionManager() {
try {
final SSLContext sslContext = SSLContext.getInstance("SSL");
sslContext.init(
null,
new TrustManager[] {
new X509TrustManager() {
@Override
public void checkClientTrusted(X509Certificate[] x509Certificates, String s)
throws CertificateException {}
@Override
public void checkServerTrusted(X509Certificate[] x509Certificates, String s)
throws CertificateException {}
@Override
public X509Certificate[] getAcceptedIssuers() {
return null;
}
}
},
new SecureRandom());
final Registry<ConnectionSocketFactory> registry =
RegistryBuilder.<ConnectionSocketFactory>create()
.register("http", PlainConnectionSocketFactory.INSTANCE)
.register("https", new SSLConnectionSocketFactory(sslContext))
.build();
connectionManager = new PoolingHttpClientConnectionManager(registry);
connectionManager.setMaxTotal(
Integer.parseInt(System.getProperty("zuul.max.host.connections", "200")));
connectionManager.setDefaultMaxPerRoute(
Integer.parseInt(System.getProperty("zuul.max.host.connections", "20")));
return connectionManager;
} catch (Exception ex) {
throw new RuntimeException(ex);
}
}
protected CloseableHttpClient newClient() {
final RequestConfig requestConfig =
RequestConfig.custom()
.setSocketTimeout(SOCKET_TIMEOUT.get())
.setConnectTimeout(CONNECTION_TIMEOUT.get())
.setCookieSpec(CookieSpecs.IGNORE_COOKIES)
.build();
return HttpClients.custom()
.setConnectionManager(newConnectionManager())
.setDefaultRequestConfig(requestConfig)
.setRetryHandler(new DefaultHttpRequestRetryHandler(0, false))
.setRedirectStrategy(
new RedirectStrategy() {
@Override
public boolean isRedirected(
HttpRequest request, HttpResponse response, HttpContext context)
throws ProtocolException {
return false;
}
@Override
public HttpUriRequest getRedirect(
HttpRequest request, HttpResponse response, HttpContext context)
throws ProtocolException {
return null;
}
})
.build();
}
private HttpResponse forward(
HttpClient httpclient,
String verb,
String uri,
HttpServletRequest request,
MultiValueMap<String, String> headers,
MultiValueMap<String, String> params,
InputStream requestEntity)
throws Exception {
Map<String, Object> info = this.helper.debug(verb, uri, headers, params, requestEntity);
URL host = RequestContext.getCurrentContext().getRouteHost();
HttpHost httpHost = getHttpHost(host);
uri = StringUtils.cleanPath(host.getPath() + uri);
HttpRequest httpRequest;
switch (verb.toUpperCase()) {
case "POST":
HttpPost httpPost = new HttpPost(uri + getQueryString());
httpRequest = httpPost;
httpPost.setEntity(new InputStreamEntity(requestEntity, request.getContentLength()));
break;
case "PUT":
HttpPut httpPut = new HttpPut(uri + getQueryString());
httpRequest = httpPut;
httpPut.setEntity(new InputStreamEntity(requestEntity, request.getContentLength()));
break;
case "PATCH":
HttpPatch httpPatch = new HttpPatch(uri + getQueryString());
httpRequest = httpPatch;
httpPatch.setEntity(new InputStreamEntity(requestEntity, request.getContentLength()));
break;
default:
httpRequest = new BasicHttpRequest(verb, uri + getQueryString());
log.debug(uri + getQueryString());
}
try {
httpRequest.setHeaders(convertHeaders(headers));
log.debug(httpHost.getHostName() + " " + httpHost.getPort() + " " + httpHost.getSchemeName());
HttpResponse zuulResponse = forwardRequest(httpclient, httpHost, httpRequest);
this.helper.appendDebug(
info,
zuulResponse.getStatusLine().getStatusCode(),
revertHeaders(zuulResponse.getAllHeaders()));
return zuulResponse;
} finally {
// When HttpClient instance is no longer needed,
// shut down the connection manager to ensure
// immediate deallocation of all system resources
// httpclient.getConnectionManager().shutdown();
}
}
private MultiValueMap<String, String> revertHeaders(Header[] headers) {
MultiValueMap<String, String> map = new LinkedMultiValueMap<String, String>();
for (Header header : headers) {
String name = header.getName();
if (!map.containsKey(name)) {
map.put(name, new ArrayList<String>());
}
map.get(name).add(header.getValue());
}
return map;
}
private Header[] convertHeaders(MultiValueMap<String, String> headers) {
List<Header> list = new ArrayList<>();
for (String name : headers.keySet()) {
for (String value : headers.get(name)) {
list.add(new BasicHeader(name, value));
}
}
return list.toArray(new BasicHeader[0]);
}
private HttpResponse forwardRequest(
HttpClient httpclient, HttpHost httpHost, HttpRequest httpRequest) throws IOException {
return httpclient.execute(httpHost, httpRequest);
}
private String getQueryString() throws UnsupportedEncodingException {
HttpServletRequest request = RequestContext.getCurrentContext().getRequest();
MultiValueMap<String, String> params = helper.buildZuulRequestQueryParams(request);
StringBuilder query = new StringBuilder();
for (Map.Entry<String, List<String>> entry : params.entrySet()) {
String key = URLEncoder.encode(entry.getKey(), "UTF-8");
for (String value : entry.getValue()) {
query.append("&");
query.append(key);
query.append("=");
query.append(URLEncoder.encode(value, "UTF-8"));
}
}
return (query.length() > 0) ? "?" + query.substring(1) : "";
}
private HttpHost getHttpHost(URL host) {
HttpHost httpHost = new HttpHost(host.getHost(), host.getPort(), host.getProtocol());
return httpHost;
}
private InputStream getRequestBody(HttpServletRequest request) {
InputStream requestEntity = null;
try {
requestEntity = request.getInputStream();
} catch (IOException ex) {
// no requestBody is ok.
}
return requestEntity;
}
private String getVerb(HttpServletRequest request) {
String sMethod = request.getMethod();
return sMethod.toUpperCase();
}
private void setResponse(HttpResponse response) throws IOException {
this.helper.setResponse(
response.getStatusLine().getStatusCode(),
response.getEntity() == null ? null : response.getEntity().getContent(),
revertHeaders(response.getAllHeaders()));
}
/**
* Add header names to exclude from proxied response in the current request.
*
* @param names
*/
protected void addIgnoredHeaders(String... names) {
helper.addIgnoredHeaders(names);
}
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getAWSSecretKey()
*/
@Override
public String getAWSSecretKey() {
return configInstance.getStringProperty(namespace + "awsSecretKey", null).get().trim();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getAWSAccessId()
*/
@Override
public String getAWSAccessId() {
return configInstance.getStringProperty(namespace + "awsAccessId", null).get().trim();
}
@Override
public long getASGUpdateIntervalMs() {
return configInstance.getIntProperty(namespace + "asgUpdateIntervalMs", (60 * 1000)).get();
}
/**
* User: gorzell Date: 1/17/13 Time: 10:18 AM Some of the basic plumbing and properties for a
* polling source that talks to Dynamo.
*/
public abstract class AbstractDynamoDbConfigurationSource<T> {
private static final Logger log =
LoggerFactory.getLogger(AbstractDynamoDbConfigurationSource.class);
// Property names
static final String tablePropertyName = "com.netflix.config.dynamo.tableName";
static final String keyAttributePropertyName = "com.netflix.config.dynamo.keyAttributeName";
static final String valueAttributePropertyName = "com.netflix.config.dynamo.valueAttributeName";
static final String endpointPropertyName = "com.netflix.config.dynamo.endpoint";
static final String pollingMaxBackOffMsPropertyName =
"com.netflix.config.dynamo.maxPollingBackOffMs";
static final String pollingMinBackOffMsPropertyName =
"com.netflix.config.dynamo.maxPollingBackOffMs";
static final String maxRetryCountPropertyName = "com.netflix.config.dynamo.maxRetryCount";
// Property defaults
static final String defaultTable = "archaiusProperties";
static final String defaultKeyAttribute = "key";
static final String defaultValueAttribute = "value";
static final String defaultEndpoint = "dynamodb.us-east-1.amazonaws.com";
static final Long defaultMaxBackOffMs = 5 * 1000L;
static final Long defaultMinBackOffMs = 500L;
static final Long defaultMaxRetryCount = 100L;
// Dynamic Properties
protected DynamicStringProperty tableName =
DynamicPropertyFactory.getInstance().getStringProperty(tablePropertyName, defaultTable);
protected DynamicStringProperty keyAttributeName =
DynamicPropertyFactory.getInstance()
.getStringProperty(keyAttributePropertyName, defaultKeyAttribute);
protected DynamicStringProperty valueAttributeName =
DynamicPropertyFactory.getInstance()
.getStringProperty(valueAttributePropertyName, defaultValueAttribute);
protected DynamicStringProperty endpointName =
DynamicPropertyFactory.getInstance().getStringProperty(endpointPropertyName, defaultEndpoint);
protected DynamicLongProperty maxBackOffMs =
DynamicPropertyFactory.getInstance()
.getLongProperty(pollingMaxBackOffMsPropertyName, defaultMaxBackOffMs);
protected DynamicLongProperty minBackOffMs =
DynamicPropertyFactory.getInstance()
.getLongProperty(pollingMinBackOffMsPropertyName, defaultMinBackOffMs);
protected DynamicLongProperty maxRetryCount =
DynamicPropertyFactory.getInstance()
.getLongProperty(maxRetryCountPropertyName, defaultMaxRetryCount);
protected AmazonDynamoDB dbClient;
public AbstractDynamoDbConfigurationSource() {
this(new AmazonDynamoDBClient());
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(ClientConfiguration clientConfiguration) {
this(new AmazonDynamoDBClient(clientConfiguration));
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(AWSCredentials credentials) {
this(new AmazonDynamoDBClient(credentials));
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(
AWSCredentials credentials, ClientConfiguration clientConfiguration) {
this(new AmazonDynamoDBClient(credentials, clientConfiguration));
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(AWSCredentialsProvider credentialsProvider) {
this(new AmazonDynamoDBClient(credentialsProvider));
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(
AWSCredentialsProvider credentialsProvider, ClientConfiguration clientConfiguration) {
this(new AmazonDynamoDBClient(credentialsProvider, clientConfiguration));
setEndpoint();
}
public AbstractDynamoDbConfigurationSource(AmazonDynamoDB dbClient) {
this.dbClient = dbClient;
}
protected ScanResult dbScanWithThroughputBackOff(ScanRequest scanRequest) {
Long currentBackOffMs = minBackOffMs.get();
Long retryCount = 0L;
while (true) {
try {
return dbClient.scan(scanRequest);
} catch (ProvisionedThroughputExceededException e) {
currentBackOffMs = Math.min(currentBackOffMs * 2, maxBackOffMs.get());
log.error(
String.format(
"Failed to poll Dynamo due to ProvisionedThroughputExceededException. Backing off for %d ms.",
currentBackOffMs));
if (retryCount > maxRetryCount.get()) {
throw e;
}
retryCount++;
try {
Thread.sleep(currentBackOffMs);
} catch (InterruptedException ex) {
}
}
}
}
protected abstract Map<String, T> loadPropertiesFromTable(String table);
// TODO Javadoc
public void validateDb() {
String table = tableName.get();
loadPropertiesFromTable(table);
log.info("Successfully polled Dynamo for a new configuration based on table:" + table);
}
private void setEndpoint() {
String endpoint = endpointName.get();
dbClient.setEndpoint(endpoint);
log.info("Set Dynamo endpoint:" + endpoint);
}
}
protected DynamicStringProperty getProperty(String key) {
return DynamicPropertyFactory.getInstance().getStringProperty(key, VALUE_NOT_SET);
}
@Override
public int getMaxElementsInReplicationPool() {
return configInstance.getIntProperty(namespace + "maxElementsInReplicationPool", 120).get();
}
@Override
public int getMinThreadsForStatusReplication() {
return configInstance.getIntProperty(namespace + "minThreadsForStatusReplication", 1).get();
}
@Override
public long getMaxIdleThreadInMinutesAgeForStatusReplication() {
return configInstance
.getLongProperty(namespace + "maxIdleThreadAgeInMinutesForStatusReplication", 10)
.get();
}
@Override
public boolean shouldDisableDelta() {
return configInstance.getBooleanProperty(namespace + "disableDelta", false).get();
}
@Override
public long getResponseCacheUpdateIntervalMs() {
return configInstance
.getIntProperty(namespace + "responseCacheUpdateIntervalMs", (30 * 1000))
.get();
}
@Override
public long getResponseCacheAutoExpirationInSeconds() {
return configInstance
.getIntProperty(namespace + "responseCacheAutoExpirationInSeconds", 180)
.get();
}
@Override
public long getEvictionIntervalTimerInMs() {
return configInstance
.getLongProperty(namespace + "evictionIntervalTimerInMs", (60 * 1000))
.get();
}
@Override
public long getMaxIdleThreadAgeInMinutesForReplication() {
return configInstance
.getIntProperty(namespace + "maxIdleThreadAgeInMinutesForReplication", 15)
.get();
}
public class Rewriter {
private DatastoreObjectCache<RewriteRule> rules =
new DatastoreObjectCache<>(
RewriteRule.class,
DynamicPropertyFactory.getInstance().getLongProperty("rewrite.cache", 60 * 1000));
}
/**
* Load balancer that can avoid a zone as a whole when choosing server.
*
* <p>The key metric used to measure the zone condition is Average Active Requests, which is
* aggregated per rest client per zone. It is the total outstanding requests in a zone divided by
* number of available targeted instances (excluding circuit breaker tripped instances). This metric
* is very effective when timeout occurs slowly on a bad zone.
*
* <p>The LoadBalancer will calculate and examine zone stats of all available zones. If the Average
* Active Requests for any zone has reached a configured threshold, this zone will be dropped from
* the active server list. In case more than one zone has reached the threshold, the zone with the
* most active requests per server will be dropped. Once the the worst zone is dropped, a zone will
* be chosen among the rest with the probability proportional to its number of instances. A server
* will be returned from the chosen zone with a given Rule (A Rule is a load balancing strategy, for
* example {@link AvailabilityFilteringRule}) For each request, the steps above will be repeated.
* That is to say, each zone related load balancing decisions are made at real time with the
* up-to-date statistics aiding the choice.
*
* @author awang
* @param <T>
*/
public class ZoneAwareLoadBalancer<T extends Server> extends DynamicServerListLoadBalancer<T> {
private ConcurrentHashMap<String, BaseLoadBalancer> balancers =
new ConcurrentHashMap<String, BaseLoadBalancer>();
private static final Logger logger = LoggerFactory.getLogger(ZoneAwareLoadBalancer.class);
private volatile DynamicDoubleProperty triggeringLoad;
private volatile DynamicDoubleProperty triggeringBlackoutPercentage;
private static final DynamicBooleanProperty ENABLED =
DynamicPropertyFactory.getInstance()
.getBooleanProperty("ZoneAwareNIWSDiscoveryLoadBalancer.enabled", true);
void setUpServerList(List<Server> upServerList) {
this.upServerList = upServerList;
}
public ZoneAwareLoadBalancer() {
super();
}
public ZoneAwareLoadBalancer(
IClientConfig clientConfig,
IRule rule,
IPing ping,
ServerList<T> serverList,
ServerListFilter<T> filter) {
super(clientConfig, rule, ping, serverList, filter);
}
public ZoneAwareLoadBalancer(IClientConfig niwsClientConfig) {
super(niwsClientConfig);
}
@Override
protected void setServerListForZones(Map<String, List<Server>> zoneServersMap) {
super.setServerListForZones(zoneServersMap);
if (balancers == null) {
balancers = new ConcurrentHashMap<String, BaseLoadBalancer>();
}
for (Map.Entry<String, List<Server>> entry : zoneServersMap.entrySet()) {
String zone = entry.getKey().toLowerCase();
getLoadBalancer(zone).setServersList(entry.getValue());
}
// check if there is any zone that no longer has a server
// and set the list to empty so that the zone related metrics does not
// contain stale data
for (Map.Entry<String, BaseLoadBalancer> existingLBEntry : balancers.entrySet()) {
if (!zoneServersMap.keySet().contains(existingLBEntry.getKey())) {
existingLBEntry.getValue().setServersList(Collections.emptyList());
}
}
}
@Override
public Server chooseServer(Object key) {
if (!ENABLED.get() || getLoadBalancerStats().getAvailableZones().size() <= 1) {
logger.debug("Zone aware logic disabled or there is only one zone");
return super.chooseServer(key);
}
Server server = null;
try {
LoadBalancerStats lbStats = getLoadBalancerStats();
Map<String, ZoneSnapshot> zoneSnapshot = ZoneAvoidanceRule.createSnapshot(lbStats);
logger.debug("Zone snapshots: {}", zoneSnapshot);
if (triggeringLoad == null) {
triggeringLoad =
DynamicPropertyFactory.getInstance()
.getDoubleProperty(
"ZoneAwareNIWSDiscoveryLoadBalancer."
+ this.getName()
+ ".triggeringLoadPerServerThreshold",
0.2d);
}
if (triggeringBlackoutPercentage == null) {
triggeringBlackoutPercentage =
DynamicPropertyFactory.getInstance()
.getDoubleProperty(
"ZoneAwareNIWSDiscoveryLoadBalancer."
+ this.getName()
+ ".avoidZoneWithBlackoutPercetage",
0.99999d);
}
Set<String> availableZones =
ZoneAvoidanceRule.getAvailableZones(
zoneSnapshot, triggeringLoad.get(), triggeringBlackoutPercentage.get());
logger.debug("Available zones: {}", availableZones);
if (availableZones != null && availableZones.size() < zoneSnapshot.keySet().size()) {
String zone = ZoneAvoidanceRule.randomChooseZone(zoneSnapshot, availableZones);
logger.debug("Zone chosen: {}", zone);
if (zone != null) {
BaseLoadBalancer zoneLoadBalancer = getLoadBalancer(zone);
server = zoneLoadBalancer.chooseServer(key);
}
}
} catch (Throwable e) {
logger.error("Unexpected exception when choosing server using zone aware logic", e);
}
if (server != null) {
return server;
} else {
logger.debug("Zone avoidance logic is not invoked.");
return super.chooseServer(key);
}
}
@VisibleForTesting
BaseLoadBalancer getLoadBalancer(String zone) {
zone = zone.toLowerCase();
BaseLoadBalancer loadBalancer = balancers.get(zone);
if (loadBalancer == null) {
// We need to create rule object for load balancer for each zone
IRule rule = cloneRule(this.getRule());
loadBalancer =
new BaseLoadBalancer(this.getName() + "_" + zone, rule, this.getLoadBalancerStats());
BaseLoadBalancer prev = balancers.putIfAbsent(zone, loadBalancer);
if (prev != null) {
loadBalancer = prev;
}
}
return loadBalancer;
}
private IRule cloneRule(IRule toClone) {
IRule rule;
if (toClone == null) {
rule = new AvailabilityFilteringRule();
} else {
String ruleClass = toClone.getClass().getName();
try {
rule =
(IRule)
ClientFactory.instantiateInstanceWithClientConfig(
ruleClass, this.getClientConfig());
} catch (Exception e) {
throw new RuntimeException(
"Unexpected exception creating rule for ZoneAwareLoadBalancer", e);
}
}
return rule;
}
@Override
public void setRule(IRule rule) {
super.setRule(rule);
if (balancers != null) {
for (String zone : balancers.keySet()) {
balancers.get(zone).setRule(cloneRule(rule));
}
}
}
}
@Override
public long getDeltaRetentionTimerIntervalInMs() {
return configInstance
.getLongProperty(namespace + "deltaRetentionTimerIntervalInMs", (30 * 1000))
.get();
}
/**
* A default implementation of eureka server configuration as required by {@link
* EurekaServerConfig}.
*
* <p>The information required for configuring eureka server is provided in a configuration file.The
* configuration file is searched for in the classpath with the name specified by the property
* <em>eureka.server.props</em> and with the suffix <em>.properties</em>. If the property is not
* specified, <em>eureka-server.properties</em> is assumed as the default.The properties that are
* looked up uses the <em>namespace</em> passed on to this class.
*
* <p>If the <em>eureka.environment</em> property is specified, additionally
* <em>eureka-server-<eureka.environment>.properties</em> is loaded in addition to
* <em>eureka-server.properties</em>.
*
* @author Karthik Ranganathan
*/
public class DefaultEurekaServerConfig implements EurekaServerConfig {
private static final String ARCHAIUS_DEPLOYMENT_ENVIRONMENT = "archaius.deployment.environment";
private static final String TEST = "test";
private static final String EUREKA_ENVIRONMENT = "eureka.environment";
private static final Logger logger = LoggerFactory.getLogger(DefaultEurekaServerConfig.class);
private static final DynamicPropertyFactory configInstance =
com.netflix.config.DynamicPropertyFactory.getInstance();
private static final DynamicStringProperty EUREKA_PROPS_FILE =
DynamicPropertyFactory.getInstance()
.getStringProperty("eureka.server.props", "eureka-server");
private String namespace = "eureka.";
public DefaultEurekaServerConfig() {
init();
}
public DefaultEurekaServerConfig(String namespace) {
this.namespace = namespace;
init();
}
private void init() {
String env = ConfigurationManager.getConfigInstance().getString(EUREKA_ENVIRONMENT, TEST);
ConfigurationManager.getConfigInstance().setProperty(ARCHAIUS_DEPLOYMENT_ENVIRONMENT, env);
String eurekaPropsFile = EUREKA_PROPS_FILE.get();
try {
// ConfigurationManager
// .loadPropertiesFromResources(eurekaPropsFile);
ConfigurationManager.loadCascadedPropertiesFromResources(eurekaPropsFile);
} catch (IOException e) {
logger.warn(
"Cannot find the properties specified : {}. This may be okay if there are other environment specific properties or the configuration is installed with a different mechanism.",
eurekaPropsFile);
}
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getAWSAccessId()
*/
@Override
public String getAWSAccessId() {
return configInstance.getStringProperty(namespace + "awsAccessId", null).get().trim();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getAWSSecretKey()
*/
@Override
public String getAWSSecretKey() {
return configInstance.getStringProperty(namespace + "awsSecretKey", null).get().trim();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getEIPBindRebindRetries()
*/
@Override
public int getEIPBindRebindRetries() {
return configInstance.getIntProperty(namespace + "eipBindRebindRetries", 3).get();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getEIPBindingRetryInterval()
*/
@Override
public int getEIPBindingRetryIntervalMs() {
return configInstance
.getIntProperty(namespace + "eipBindRebindRetryIntervalMs", (5 * 60 * 1000))
.get();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#shouldEnableSelfPreservation()
*/
@Override
public boolean shouldEnableSelfPreservation() {
return configInstance.getBooleanProperty(namespace + "enableSelfPreservation", true).get();
}
/*
* (non-Javadoc)
* @see com.netflix.eureka.EurekaServerConfig#getPeerEurekaNodesUpdateInterval()
*/
@Override
public int getPeerEurekaNodesUpdateIntervalMs() {
return configInstance
.getIntProperty(namespace + "peerEurekaNodesUpdateIntervalMs", (10 * 60 * 1000))
.get();
}
@Override
public int getRenewalThresholdUpdateIntervalMs() {
return configInstance
.getIntProperty(namespace + "renewalThresholdUpdateIntervalMs", (15 * 60 * 1000))
.get();
}
@Override
public double getRenewalPercentThreshold() {
return configInstance.getDoubleProperty(namespace + "renewalPercentThreshold", 0.85).get();
}
@Override
public int getNumberOfReplicationRetries() {
return configInstance.getIntProperty(namespace + "numberOfReplicationRetries", 5).get();
}
@Override
public boolean shouldReplicateOnlyIfUP() {
return configInstance.getBooleanProperty(namespace + "replicateOnlyIfUP", true).get();
}
@Override
public int getPeerEurekaStatusRefreshTimeIntervalMs() {
return configInstance
.getIntProperty(namespace + "peerEurekaStatusRefreshTimeIntervalMs", (30 * 1000))
.get();
}
@Override
public int getWaitTimeInMsWhenSyncEmpty() {
return configInstance
.getIntProperty(namespace + "waitTimeInMsWhenSyncEmpty", (1000 * 60 * 5))
.get();
}
@Override
public int getPeerNodeConnectTimeoutMs() {
return configInstance.getIntProperty(namespace + "peerNodeConnectTimeoutMs", 200).get();
}
@Override
public int getPeerNodeReadTimeoutMs() {
return configInstance.getIntProperty(namespace + "peerNodeReadTimeoutMs", 200).get();
}
@Override
public int getPeerNodeTotalConnections() {
return configInstance.getIntProperty(namespace + "peerNodeTotalConnections", 1000).get();
}
@Override
public int getPeerNodeTotalConnectionsPerHost() {
return configInstance.getIntProperty(namespace + "peerNodeTotalConnections", 500).get();
}
@Override
public int getPeerNodeConnectionIdleTimeoutSeconds() {
return configInstance
.getIntProperty(namespace + "peerNodeConnectionIdleTimeoutSeconds", 30)
.get();
}
@Override
public boolean shouldRetryIndefinitelyToReplicateStatus() {
return configInstance
.getBooleanProperty(namespace + "retryIndefinitelyToReplicateStatus", true)
.get();
}
@Override
public long getRetentionTimeInMSInDeltaQueue() {
return configInstance
.getLongProperty(namespace + "retentionTimeInMSInDeltaQueue", (3 * 60 * 1000))
.get();
}
@Override
public long getDeltaRetentionTimerIntervalInMs() {
return configInstance
.getLongProperty(namespace + "deltaRetentionTimerIntervalInMs", (30 * 1000))
.get();
}
@Override
public long getEvictionIntervalTimerInMs() {
return configInstance
.getLongProperty(namespace + "evictionIntervalTimerInMs", (60 * 1000))
.get();
}
@Override
public int getASGQueryTimeoutMs() {
return configInstance.getIntProperty(namespace + "asgQueryTimeoutMs", 1000).get();
}
@Override
public long getASGUpdateIntervalMs() {
return configInstance.getIntProperty(namespace + "asgUpdateIntervalMs", (60 * 1000)).get();
}
@Override
public long getResponseCacheAutoExpirationInSeconds() {
return configInstance
.getIntProperty(namespace + "responseCacheAutoExpirationInSeconds", 180)
.get();
}
@Override
public long getResponseCacheUpdateIntervalMs() {
return configInstance
.getIntProperty(namespace + "responseCacheUpdateIntervalMs", (30 * 1000))
.get();
}
@Override
public boolean shouldDisableDelta() {
return configInstance.getBooleanProperty(namespace + "disableDelta", false).get();
}
@Override
public long getMaxIdleThreadInMinutesAgeForStatusReplication() {
return configInstance
.getLongProperty(namespace + "maxIdleThreadAgeInMinutesForStatusReplication", 10)
.get();
}
@Override
public int getMinThreadsForStatusReplication() {
return configInstance.getIntProperty(namespace + "minThreadsForStatusReplication", 1).get();
}
@Override
public int getMaxThreadsForStatusReplication() {
return configInstance.getIntProperty(namespace + "maxThreadsForStatusReplication", 1).get();
}
@Override
public int getMaxElementsInStatusReplicationPool() {
return configInstance
.getIntProperty(namespace + "maxElementsInStatusReplicationPool", 10000)
.get();
}
@Override
public int getMaxElementsInReplicationPool() {
return configInstance.getIntProperty(namespace + "maxElementsInReplicationPool", 120).get();
}
@Override
public long getMaxIdleThreadAgeInMinutesForReplication() {
return configInstance
.getIntProperty(namespace + "maxIdleThreadAgeInMinutesForReplication", 15)
.get();
}
@Override
public int getMinThreadsForReplication() {
return configInstance.getIntProperty(namespace + "minThreadsForReplication", 20).get();
}
@Override
public int getMaxThreadsForReplication() {
return configInstance.getIntProperty(namespace + "maxThreadsForReplication", 60).get();
}
@Override
public boolean shouldSyncWhenTimestampDiffers() {
return configInstance.getBooleanProperty(namespace + "syncWhenTimestampDiffers", true).get();
}
}
@Override
public int getMaxThreadsForReplication() {
return configInstance.getIntProperty(namespace + "maxThreadsForReplication", 60).get();
}
@Override
public int getASGQueryTimeoutMs() {
return configInstance.getIntProperty(namespace + "asgQueryTimeoutMs", 1000).get();
}
/**
* A copy of the InstrumentedHandler from Codahale Metric's library. The current version of the
* library does not support the most current Jetty version, in which HttpChannelState.isDispatched()
* has been removed. This class will be used until a Metric's library version is released which
* supports the Jetty change.
*/
public class InstrumentedHandler extends HandlerWrapper {
private final MetricRegistry metricRegistry;
private String name;
// the requests handled by this handler, excluding active
private Timer requests;
// the number of dispatches seen by this handler, excluding active
private Timer dispatches;
// the number of active requests
private Counter activeRequests;
// the number of active dispatches
private Counter activeDispatches;
// the number of requests currently suspended.
private Counter activeSuspended;
// the number of requests that have been asynchronously dispatched
private Meter asyncDispatches;
// the number of requests that expired while suspended
private Meter asyncTimeouts;
private Meter[] responses;
private Timer getRequests;
private Timer postRequests;
private Timer headRequests;
private Timer putRequests;
private Timer deleteRequests;
private Timer optionsRequests;
private Timer traceRequests;
private Timer connectRequests;
private Timer moveRequests;
private Timer otherRequests;
private AsyncListener listener;
private DynamicLongProperty timerReservoirSeconds =
DynamicPropertyFactory.getInstance()
.getLongProperty("http.metrics.handler.timerReservoirSeconds", 60);
/**
* Create a new instrumented handler using a given metrics registry.
*
* @param registry the registry for the metrics
*/
public InstrumentedHandler(MetricRegistry registry) {
this.metricRegistry = registry;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
protected void doStart() throws Exception {
super.doStart();
final String prefix = name(getHandler().getClass(), name);
this.requests = timer(name(prefix, "requests"));
this.dispatches = timer(name(prefix, "dispatches"));
this.activeRequests = metricRegistry.counter(name(prefix, "active-requests"));
this.activeDispatches = metricRegistry.counter(name(prefix, "active-dispatches"));
this.activeSuspended = metricRegistry.counter(name(prefix, "active-suspended"));
this.asyncDispatches = metricRegistry.meter(name(prefix, "async-dispatches"));
this.asyncTimeouts = metricRegistry.meter(name(prefix, "async-timeouts"));
this.responses =
new Meter[] {
metricRegistry.meter(name(prefix, "1xx-responses")), // 1xx
metricRegistry.meter(name(prefix, "2xx-responses")), // 2xx
metricRegistry.meter(name(prefix, "3xx-responses")), // 3xx
metricRegistry.meter(name(prefix, "4xx-responses")), // 4xx
metricRegistry.meter(name(prefix, "5xx-responses")) // 5xx
};
this.getRequests = timer(name(prefix, "get-requests"));
this.postRequests = timer(name(prefix, "post-requests"));
this.headRequests = timer(name(prefix, "head-requests"));
this.putRequests = timer(name(prefix, "put-requests"));
this.deleteRequests = timer(name(prefix, "delete-requests"));
this.optionsRequests = timer(name(prefix, "options-requests"));
this.traceRequests = timer(name(prefix, "trace-requests"));
this.connectRequests = timer(name(prefix, "connect-requests"));
this.moveRequests = timer(name(prefix, "move-requests"));
this.otherRequests = timer(name(prefix, "other-requests"));
this.listener =
new AsyncListener() {
@Override
public void onTimeout(AsyncEvent event) throws IOException {
asyncTimeouts.mark();
}
@Override
public void onStartAsync(AsyncEvent event) throws IOException {
event.getAsyncContext().addListener(this);
}
@Override
public void onError(AsyncEvent event) throws IOException {}
@Override
public void onComplete(AsyncEvent event) throws IOException {
final AsyncContextState state = (AsyncContextState) event.getAsyncContext();
final Request request = (Request) state.getRequest();
updateResponses(request);
if (!(state.getHttpChannelState().getState() == State.DISPATCHED)) {
activeSuspended.dec();
}
}
};
}
private Timer timer(String name) {
Timer timer = metricRegistry.getTimers().get(name);
if (timer != null) {
return timer;
}
try {
return metricRegistry.register(
name,
new Timer(new SlidingTimeWindowReservoir(timerReservoirSeconds.get(), TimeUnit.SECONDS)));
} catch (IllegalArgumentException e) {
// timer already exists. this happens due to race condition. its fine.
return metricRegistry.getTimers().get(name);
}
}
@Override
public void handle(
String path,
Request request,
HttpServletRequest httpRequest,
HttpServletResponse httpResponse)
throws IOException, ServletException {
activeDispatches.inc();
final long start;
final HttpChannelState state = request.getHttpChannelState();
if (state.isInitial()) {
// new request
activeRequests.inc();
start = request.getTimeStamp();
} else {
// resumed request
start = System.currentTimeMillis();
activeSuspended.dec();
if (state.getState() == State.DISPATCHED) {
asyncDispatches.mark();
}
}
try {
super.handle(path, request, httpRequest, httpResponse);
} finally {
final long now = System.currentTimeMillis();
final long dispatched = now - start;
activeDispatches.dec();
dispatches.update(dispatched, TimeUnit.MILLISECONDS);
if (state.isSuspended()) {
if (state.isInitial()) {
state.addListener(listener);
}
activeSuspended.inc();
} else if (state.isInitial()) {
requests.update(dispatched, TimeUnit.MILLISECONDS);
updateResponses(request);
}
// else onCompletion will handle it.
}
}
private Timer requestTimer(String method) {
final HttpMethod m = HttpMethod.fromString(method);
if (m == null) {
return otherRequests;
} else {
switch (m) {
case GET:
return getRequests;
case POST:
return postRequests;
case PUT:
return putRequests;
case HEAD:
return headRequests;
case DELETE:
return deleteRequests;
case OPTIONS:
return optionsRequests;
case TRACE:
return traceRequests;
case CONNECT:
return connectRequests;
case MOVE:
return moveRequests;
default:
return otherRequests;
}
}
}
private void updateResponses(Request request) {
final int response = request.getResponse().getStatus() / 100;
if (response >= 1 && response <= 5) {
responses[response - 1].mark();
}
activeRequests.dec();
final long elapsedTime = System.currentTimeMillis() - request.getTimeStamp();
requests.update(elapsedTime, TimeUnit.MILLISECONDS);
requestTimer(request.getMethod()).update(elapsedTime, TimeUnit.MILLISECONDS);
}
}
@Override
public boolean shouldSyncWhenTimestampDiffers() {
return configInstance.getBooleanProperty(namespace + "syncWhenTimestampDiffers", true).get();
}
