private static float getSpeedAdjustmentFactor() {
final String speedAdjustmentFactorString =
PropertyUtil.extractAndLogProperty(
"net.sf.ehcache.speedAdjustmentFactor", System.getProperties());
if (speedAdjustmentFactorString != null) {
return Float.parseFloat(speedAdjustmentFactorString);
} else {
return 1;
}
}
/**
* Extract a Boolean out of a Property
*
* @param properties the properties
* @param propertyName the name of the property
* @param defaultValue the deulat value id none is found
* @return the extracted property
*/
protected boolean extractBooleanProperty(
Properties properties, String propertyName, boolean defaultValue) {
boolean ret;
String pString = PropertyUtil.extractAndLogProperty(propertyName, properties);
if (pString != null) {
ret = PropertyUtil.parseBoolean(pString);
} else {
ret = defaultValue;
}
return ret;
}
/**
* peerDiscovery=automatic, multicastGroupAddress=230.0.0.1, multicastGroupPort=4446,
* multicastPacketTimeToLive=255
*/
protected CacheManagerPeerProvider createAutomaticallyConfiguredCachePeerProvider(
CacheManager cacheManager, Properties properties) throws IOException {
String hostName = PropertyUtil.extractAndLogProperty(HOST_NAME, properties);
InetAddress hostAddress = null;
if (hostName != null && hostName.length() != 0) {
hostAddress = InetAddress.getByName(hostName);
if (hostName.equals("localhost")) {
LOG.log(
Level.WARNING,
"Explicitly setting the multicast hostname to 'localhost' is not recommended. "
+ "It will only work if all CacheManager peers are on the same machine.");
}
}
String groupAddressString =
PropertyUtil.extractAndLogProperty(MULTICAST_GROUP_ADDRESS, properties);
InetAddress groupAddress = InetAddress.getByName(groupAddressString);
String multicastPortString =
PropertyUtil.extractAndLogProperty(MULTICAST_GROUP_PORT, properties);
Integer multicastPort = new Integer(multicastPortString);
String packetTimeToLiveString =
PropertyUtil.extractAndLogProperty(MULTICAST_PACKET_TTL, properties);
Integer timeToLive;
if (packetTimeToLiveString == null) {
timeToLive = new Integer(1);
LOG.log(
Level.FINE,
"No TTL set. Setting it to the default of 1, which means packets are limited to the same subnet.");
} else {
timeToLive = new Integer(packetTimeToLiveString);
if (timeToLive.intValue() < 0 || timeToLive.intValue() > MAXIMUM_TTL) {
throw new CacheException("The TTL must be set to a value between 0 and 255");
}
}
return new MulticastRMICacheManagerPeerProvider(
cacheManager, groupAddress, multicastPort, timeToLive, hostAddress);
}
/**
* @param properties implementation specific properties. These are configured as comma separated
* name value pairs in ehcache.xml
*/
public CacheManagerPeerProvider createCachePeerProvider(
CacheManager cacheManager, Properties properties) throws CacheException {
String peerDiscovery = PropertyUtil.extractAndLogProperty(PEER_DISCOVERY, properties);
if (peerDiscovery == null || peerDiscovery.equalsIgnoreCase(AUTOMATIC_PEER_DISCOVERY)) {
try {
return createAutomaticallyConfiguredCachePeerProvider(cacheManager, properties);
} catch (IOException e) {
throw new CacheException(
"Could not create CacheManagerPeerProvider. Initial cause was " + e.getMessage(), e);
}
} else if (peerDiscovery.equalsIgnoreCase(MANUALLY_CONFIGURED_PEER_DISCOVERY)) {
return createManuallyConfiguredCachePeerProvider(properties);
} else {
return null;
}
}
/**
* Extract a long out of a string.
*
* @param properties the property
* @param propertyName the name of the property
* @param defaultValue the default value if none is found
* @return the extracted value
*/
protected long extractAsynchronousReplicationIntervalMillis(
Properties properties, String propertyName, long defaultValue) {
String parsedString = PropertyUtil.extractAndLogProperty(propertyName, properties);
if (parsedString != null) {
try {
Long longValue = new Long(parsedString);
return longValue.longValue();
} catch (NumberFormatException e) {
LOG.warn(
"Number format exception trying to set asynchronousReplicationIntervalMillis. "
+ "Using the default instead. String value was: '"
+ parsedString
+ "'");
}
}
return defaultValue;
}
/**
* peerDiscovery=manual, rmiUrls=//hostname:port/cacheName //hostname:port/cacheName
* //hostname:port/cacheName
*/
protected CacheManagerPeerProvider createManuallyConfiguredCachePeerProvider(
Properties properties) {
String rmiUrls = PropertyUtil.extractAndLogProperty(RMI_URLS, properties);
if (rmiUrls == null || rmiUrls.length() == 0) {
LOG.log(
Level.INFO,
"Starting manual peer provider with empty list of peers. "
+ "No replication will occur unless peers are added.");
rmiUrls = new String();
}
rmiUrls = rmiUrls.trim();
StringTokenizer stringTokenizer = new StringTokenizer(rmiUrls, PayloadUtil.URL_DELIMITER);
RMICacheManagerPeerProvider rmiPeerProvider = new ManualRMICacheManagerPeerProvider();
while (stringTokenizer.hasMoreTokens()) {
String rmiUrl = stringTokenizer.nextToken();
rmiUrl = rmiUrl.trim();
rmiPeerProvider.registerPeer(rmiUrl);
if (LOG.isLoggable(Level.FINE)) {
LOG.log(Level.FINE, "Registering peer " + rmiUrl);
}
}
return rmiPeerProvider;
}
