public static void main(String[] args) {
JedisPool pool = new JedisPool(new JedisPoolConfig(), "localhost");
Jedis jedis = null;
try {
jedis = pool.getResource();
/// ... do stuff here ... for example
jedis.set("foo", "bar");
String foobar = jedis.get("foo");
System.out.println("foobar=" + foobar);
jedis.zadd("sose", 0, "car");
jedis.zadd("sose", 0, "bike");
Set<String> sose = jedis.zrange("sose", 0, -1);
jedis.watch("foo");
Transaction t = jedis.multi();
t.set("foo", "bar");
t.exec();
} finally {
if (jedis != null) {
jedis.close();
}
}
/// ... when closing your application:
pool.destroy();
// Jedis jedis = new Jedis("localhost");
// //jedis.set("foo", "bar");
// String value = jedis.get("foo");
// System.out.println("value=" + value);
}
protected void initRedis(String host, int port) {
JedisPool pool = new JedisPool(new JedisPoolConfig(), host, port);
jedis = pool.getResource();
jedis.connect();
jedis.getClient().setTimeoutInfinite();
jedis.flushAll();
}
/** Try lock with value */
public Boolean tryLock() {
if (isTimeout()) {
return true;
}
Jedis jedis = null;
try {
jedis = pool.getResource();
String newHoldValue = identity + getTimestamp();
String result = jedis.set(key, newHoldValue, "NX", "PX", expireTime);
if ("OK".equals(result)) {
lastHoldValue = newHoldValue;
return true;
}
return false;
} catch (JedisConnectionException e) {
if (jedis != null) {
pool.returnBrokenResource(jedis);
}
updateLastFailedTime();
throw e;
} finally {
if (jedis != null) {
pool.returnResource(jedis);
}
}
}
public synchronized void recover() {
logger.debug("recover...");
if (status.equals(STATUS.READY)) {
logger.debug("The redis's status is ready, return void.");
return;
}
jedisPool.returnBrokenResource(subscriber);
subscriber = null;
subscriber = jedisPool.getResource();
status = STATUS.INIT;
new Thread(
new Runnable() {
@Override
public void run() {
try {
logger.debug("重新预订阅主题...");
subscriber.subscribe(listener, "~~~~~~~");
} catch (Exception e) {
logger.error(e.getMessage(), e);
logger.error("预订阅退出...");
status = STATUS.BROKEN;
}
}
})
.start();
status = STATUS.READY;
logger.debug("recover done");
}
private void deferExpired() {
for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
JedisPool jedisPool = entry.getValue();
try {
Jedis jedis = jedisPool.getResource();
try {
RedisRegistryUtil.publishToJedis(jedis, getRegistered(), root, expirePeriod);
if (admin) {
clean(jedis);
}
if (!replicate) {
break; // 如果服务器端已同步数据，只需写入单台机器
}
} finally {
jedisPool.returnResource(jedis);
}
} catch (Throwable t) {
logger.warn(
"Failed to write provider heartbeat to redis registry. registry: "
+ entry.getKey()
+ ", cause: "
+ t.getMessage(),
t);
}
}
}
public static void main(String[] args) {
JedisPool jedisPool = new JedisPool("localhost");
try {
Jedis jedis = jedisPool.getResource();
String result = jedis.get("msg");
System.out.println(result);
jedis.set("msg_java", "Hello Java");
jedisPool.returnResource(jedis);
String key, value;
Scanner sc = new Scanner(System.in);
do {
System.out.println("veuillez entrer la clé");
key = sc.next();
System.out.println("veuillez entrer la valeur");
value = sc.next();
jedis.set(key, value);
jedisPool.returnResource(jedis);
System.out.println(key + " " + value);
System.out.println(key + " " + jedis.get(key));
} while (!key.equals(""));
sc.close();
} finally {
jedisPool.destroy();
}
}
public static void getBackupSummary(String id, String bkpId) throws Exception {
SalesforceOrg org = dbUtils.findOrganizationById(id);
for (Backup bkp : dbUtils.backupsForOrg(org.getOrgId())) {
if (bkpId.equalsIgnoreCase((bkp.getId()))) {
JedisPool pool = null;
Jedis jedis = null;
try {
pool = poolFactory.getPool();
jedis = pool.getResource();
response.setContentTypeIfNotSet("application/json");
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.setSerializationInclusion(Inclusion.NON_NULL);
renderJSON(
objectMapper.writeValueAsString(
DifferenceUtils.summarizeDifferences(
jedis.hget(bkp.getGitVersion(), "changes"))));
} finally {
if (pool != null && jedis != null) {
pool.returnResource(jedis);
}
}
break;
}
}
renderJSON("{}");
}
private Map<String, Double> getPrices(JedisPool pool, boolean openingPrices) {
Map<String, Double> prices = new HashMap<String, Double>();
Jedis jedis = null;
try {
jedis = pool.getResource();
String[] keys = new String[TICKER_SYMBOLS.length];
int i = 0;
for (String symbol : TICKER_SYMBOLS) {
symbol = (openingPrices) ? symbol + ".start" : symbol;
keys[i++] = "stock." + symbol;
}
List<String> values = jedis.mget(keys);
i = 0;
for (String value : values) {
if (value == null) {
throw new IllegalStateException(
"Redis should contain a value for stock " + TICKER_SYMBOLS[i++]);
}
prices.put(TICKER_SYMBOLS[i++], Double.valueOf(value));
}
pool.returnResource(jedis);
} catch (RuntimeException re) {
if (jedis != null) pool.returnBrokenResource(jedis);
}
return prices;
}
public static void main(String[] args) throws Exception {
JedisPool pool =
JedisPoolFactory.createJedisPool(
JedisUtils.DEFAULT_HOST, JedisUtils.DEFAULT_PORT, JedisUtils.DEFAULT_TIMEOUT, 1);
try {
JobDispatcher dispatcher = new JobDispatcher("ss", pool);
JobStatistics statistics = new JobStatistics("ss", pool);
startPrintStatistics(statistics);
dispatcher.start();
System.out.println("Hit enter to stop.");
while (true) {
char c = (char) System.in.read();
if (c == '\n') {
System.out.println("Shuting down");
dispatcher.stop();
stopPrintStatistics();
return;
}
}
} finally {
pool.destroy();
}
}
private void deferExpired() {
for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
JedisPool jedisPool = entry.getValue();
try {
Jedis jedis = jedisPool.getResource();
try {
for (Node node : new HashSet<Node>(getRegistered())) {
String key = NodeRegistryUtils.getNodeTypePath(clusterName, node.getNodeType());
if (jedis.hset(
key, node.toFullString(), String.valueOf(SystemClock.now() + expirePeriod))
== 1) {
jedis.publish(key, Constants.REGISTER);
}
}
if (lock.acquire(jedis)) {
clean(jedis);
}
if (!replicate) {
break; // 如果服务器端已同步数据，只需写入单台机器
}
} finally {
jedis.close();
}
} catch (Throwable t) {
LOGGER.warn(
"Failed to write provider heartbeat to redis registry. registry: "
+ entry.getKey()
+ ", cause: "
+ t.getMessage(),
t);
}
}
}
@Test
public void create() throws Exception {
Map<String, String> attrs = ImmutableMap.of("x", "X");
Map<String, String> attrsToSave =
ImmutableMap.of(
"x", "X",
"_accessedAt", "2",
"_createdAt", "1",
"_savedAt", "3");
new MockUnit(JedisPool.class, Session.class)
.expect(
unit -> {
Session session = unit.get(Session.class);
expect(session.id()).andReturn("1234");
expect(session.attributes()).andReturn(attrs);
expect(session.createdAt()).andReturn(1L);
expect(session.accessedAt()).andReturn(2L);
expect(session.savedAt()).andReturn(3L);
})
.expect(
unit -> {
Jedis jedis = unit.mock(Jedis.class);
expect(jedis.hmset("sessions:1234", attrsToSave)).andReturn("sessions:1234");
expect(jedis.expire("sessions:1234", 1800)).andReturn(1L);
jedis.close();
JedisPool pool = unit.get(JedisPool.class);
expect(pool.getResource()).andReturn(jedis);
})
.run(
unit -> {
new RedisSessionStore(unit.get(JedisPool.class), "sessions", "30m")
.create(unit.get(Session.class));
});
}
@Override
public String call() {
Meter job_process_rate = metrics.getMetrics().meter(Constants.JOBS_PROCESS_RATE);
JedisPool pool = null;
Jedis jedis = null;
try {
pool = redis.getRedisConnectionPool();
jedis = pool.getResource();
List<String> payload = jedis.brpop(0, Constants.JOBS_QUEUE);
// TODO perform some processing on the payload here
// Mark processing of the job here in the metrics library
// These metrics are aggregated and sent to graphite
job_process_rate.mark();
} catch (JedisConnectionException e) {
// returnBrokenResource when the state of the object is
// unrecoverable
if (null != jedis) {
jedis.close();
}
} finally {
if (null != jedis) {
jedis.close();
}
}
return "Done processing Callable Task ";
}
@Test(expected = IllegalStateException.class)
public void shouldCloseJedisOnGetErr() throws Exception {
new MockUnit(JedisPool.class, Session.Builder.class)
.expect(
unit -> {
Session.Builder sb = unit.get(Session.Builder.class);
expect(sb.sessionId()).andReturn("1234");
})
.expect(
unit -> {
Jedis jedis = unit.mock(Jedis.class);
expect(jedis.hgetAll("sessions:1234"))
.andThrow(new IllegalStateException("intentional err"));
jedis.close();
JedisPool pool = unit.get(JedisPool.class);
expect(pool.getResource()).andReturn(jedis);
})
.run(
unit -> {
new RedisSessionStore(unit.get(JedisPool.class), "sessions", "30m")
.get(unit.get(Session.Builder.class));
});
}
@Test
public void getEmptyExpired() throws Exception {
Map<String, String> attrs = Collections.emptyMap();
new MockUnit(JedisPool.class, Session.Builder.class)
.expect(
unit -> {
Session.Builder sb = unit.get(Session.Builder.class);
expect(sb.sessionId()).andReturn("1234");
})
.expect(
unit -> {
Jedis jedis = unit.mock(Jedis.class);
expect(jedis.hgetAll("sessions:1234")).andReturn(attrs);
jedis.close();
JedisPool pool = unit.get(JedisPool.class);
expect(pool.getResource()).andReturn(jedis);
})
.run(
unit -> {
assertEquals(
null,
new RedisSessionStore(unit.get(JedisPool.class), "sessions", "30m")
.get(unit.get(Session.Builder.class)));
});
}
@Test
public void testCloseable() throws IOException {
Set<HostAndPort> jedisClusterNode = new HashSet<HostAndPort>();
jedisClusterNode.add(new HostAndPort(nodeInfo1.getHost(), nodeInfo1.getPort()));
JedisCluster jc = null;
try {
jc = new JedisCluster(jedisClusterNode);
jc.set("51", "foo");
} finally {
if (jc != null) {
jc.close();
}
}
Iterator<JedisPool> poolIterator = jc.getClusterNodes().values().iterator();
while (poolIterator.hasNext()) {
JedisPool pool = poolIterator.next();
try {
pool.getResource();
fail("JedisCluster's internal pools should be already destroyed");
} catch (JedisConnectionException e) {
// ok to go...
}
}
}
public void destroy() {
super.destroy();
try {
expireFuture.cancel(true);
} catch (Throwable t) {
logger.warn(t.getMessage(), t);
}
try {
for (RedisRegistryNotifier notifier : notifiers.values()) {
notifier.shutdown();
}
} catch (Throwable t) {
logger.warn(t.getMessage(), t);
}
for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
JedisPool jedisPool = entry.getValue();
try {
jedisPool.destroy();
} catch (Throwable t) {
logger.warn(
"Failed to destroy the redis registry client. registry: "
+ entry.getKey()
+ ", cause: "
+ t.getMessage(),
t);
}
}
}
public void doSubscribe(final URL url, final NotifyListener listener) {
String service = RedisRegistryUtil.toServicePath(url, root);
RedisRegistryNotifier notifier = notifiers.get(service);
if (notifier == null) {
RedisRegistryNotifier newNotifier = new RedisRegistryNotifier(service, this);
notifiers.putIfAbsent(service, newNotifier);
notifier = notifiers.get(service);
if (notifier == newNotifier) {
notifier.start();
}
}
boolean success = false;
RpcException exception = null;
for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
JedisPool jedisPool = entry.getValue();
try {
Jedis jedis = jedisPool.getResource();
try {
if (service.endsWith(Constants.ANY_VALUE)) {
admin = true;
Set<String> keys = jedis.keys(service);
if (keys != null && keys.size() > 0) {
Map<String, Set<String>> serviceKeys = RedisRegistryUtil.getServiceKeys(keys, root);
for (Set<String> sk : serviceKeys.values()) {
doNotify(jedis, sk, url, Arrays.asList(listener));
}
}
} else {
doNotify(
jedis,
jedis.keys(service + Constants.PATH_SEPARATOR + Constants.ANY_VALUE),
url,
Arrays.asList(listener));
}
success = true;
break; // 只需读一个服务器的数据
} finally {
jedisPool.returnResource(jedis);
}
} catch (Throwable t) { // 尝试下一个服务器
exception =
new RpcException(
"Failed to subscribe service from redis registry. registry: "
+ entry.getKey()
+ ", service: "
+ url
+ ", cause: "
+ t.getMessage(),
t);
}
}
if (exception != null) {
if (success) {
logger.warn(exception.getMessage(), exception);
} else {
throw exception;
}
}
}
/**
* Add the specified member to the set value stored at key. If member is already a member of the
* set no operation is performed. If key does not exist a new set with the specified member as
* sole member is created. If the key exists but does not hold a set value an error is returned.
*
* <p>Time complexity O(1)
*
* @param key
* @param member
* @return Integer reply, specifically: 1 if the new element was added 0 if the element was
* already a member of the set
*/
public long sadd(String key, String member) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.sadd(key, member);
} finally {
jedisPool.returnResource(jedis);
}
}
/**
* Set a timeout on the specified key. After the timeout the key will be automatically deleted by
* the server. A key with an associated timeout is said to be volatile in Redis terminology.
*
* <p>Voltile keys are stored on disk like the other keys, the timeout is persistent too like all
* the other aspects of the dataset. Saving a dataset containing expires and stopping the server
* does not stop the flow of time as Redis stores on disk the time when the key will no longer be
* available as Unix time, and not the remaining seconds.
*
* <p>Since Redis 2.1.3 you can update the value of the timeout of a key already having an expire
* set. It is also possible to undo the expire at all turning the key into a normal key using the
* command.
*
* <p>Time complexity: O(1)
*
* @param key
* @param seconds
* @return Integer reply, specifically: 1: the timeout was set. 0: the timeout was not set since
* the key already has an associated timeout (this may happen only in Redis versions < 2.1.3,
* Redis >= 2.1.3 will happily update the timeout), or the key does not exist.
* @see <ahref="http://code.google.com/p/redis/wiki/ExpireCommand">ExpireCommand</a>
*/
public Long expire(final byte[] key, final int seconds) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.expire(key, seconds);
} finally {
jedisPool.returnResource(jedis);
}
}
/**
* GETSET is an atomic set this value and return the old value command. Set key to the string
* value and return the old value stored at key. The string can't be longer than 1073741824 bytes
* (1 GB).
*
* <p>Time complexity: O(1)
*
* @param key
* @param value
* @return Bulk reply
*/
public String getSet(final String key, final String value) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.getSet(key, value);
} finally {
jedisPool.returnResource(jedis);
}
}
/**
* Remove the specified keys. If a given key does not exist no operation is performed for this
* key. The command returns the number of keys removed.
*
* <p>Time complexity: O(1)
*
* @param keys
* @return Integer reply, specifically: an integer greater than 0 if one or more keys were removed
* 0 if none of the specified key existed
*/
public Long del(final String... keys) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.del(keys);
} finally {
jedisPool.returnResource(jedis);
}
}
/**
* The command is exactly equivalent to the following group of commands: {@link #set(String,
* String) SET} + {@link #expire(String, int) EXPIRE}. The operation is atomic.
*
* <p>Time complexity: O(1)
*
* @param key
* @param seconds
* @param value
* @return Status code reply
*/
public String setex(final String key, final int seconds, final String value) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.setex(key, seconds, value);
} finally {
jedisPool.returnResource(jedis);
}
}
/**
* Remove the specified member from the set value stored at key. If member was not a member of the
* set no operation is performed. If key does not hold a set value an error is returned.
*
* <p>Time complexity O(1)
*
* @param key
* @param member
* @return Integer reply, specifically: 1 if the new element was removed 0 if the new element was
* not a member of the set
*/
public Long srem(final String key, final String member) {
Jedis jedis = jedisPool.getResource();
try {
return jedis.srem(key, member);
} finally {
jedisPool.returnResource(jedis);
}
}
@Override
protected void doSubscribe(Node node, NotifyListener listener) {
List<NodeType> listenNodeTypes = node.getListenNodeTypes();
if (CollectionUtils.isEmpty(listenNodeTypes)) {
return;
}
for (NodeType listenNodeType : listenNodeTypes) {
String listenNodePath = NodeRegistryUtils.getNodeTypePath(clusterName, listenNodeType);
Notifier notifier = notifiers.get(listenNodePath);
if (notifier == null) {
Notifier newNotifier = new Notifier(listenNodePath);
notifiers.putIfAbsent(listenNodePath, newNotifier);
notifier = notifiers.get(listenNodePath);
if (notifier == newNotifier) {
notifier.start();
}
}
boolean success = false;
NodeRegistryException exception = null;
for (Map.Entry<String, JedisPool> entry : jedisPools.entrySet()) {
JedisPool jedisPool = entry.getValue();
try {
Jedis jedis = jedisPool.getResource();
try {
doNotify(
jedis,
Collections.singletonList(listenNodePath),
Collections.singletonList(listener));
success = true;
break; // 只需读一个服务器的数据
} finally {
jedis.close();
}
} catch (Throwable t) {
exception =
new NodeRegistryException(
"Failed to unregister node to redis registry. registry: "
+ entry.getKey()
+ ", node: "
+ node
+ ", cause: "
+ t.getMessage(),
t);
}
}
if (exception != null) {
if (success) {
LOGGER.warn(exception.getMessage(), exception);
} else {
throw exception;
}
}
}
}
public static void release(Jedis jedis, boolean isBroken) {
if (jedis != null) {
if (isBroken) {
jedisPool.returnBrokenResource(jedis);
} else {
jedisPool.returnResource(jedis);
}
}
}
@PreDestroy
protected void destroy() {
if (subscriber != null) {
jedisPool.returnResource(subscriber);
}
if (publisher != null) {
jedisPool.returnResource(publisher);
}
}
public void set(String value) {
Jedis jedis = jedisPool.getResource();
try {
jedis.set(name, value);
jedisPool.returnResource(jedis);
} catch (Exception e) {
jedisPool.returnBrokenResource(jedis);
}
}
public void clear() {
Jedis jedis = jedisPool.getResource();
try {
jedis.del(name);
jedisPool.returnResource(jedis);
} catch (Exception e) {
jedisPool.returnBrokenResource(jedis);
}
}
public String getLine(int lineNo) throws Exception {
if (lineNo <= 0 || lineNo > mNumLines) {
return null;
}
String line = null;
Jedis jedis = pool_.getResource();
try {
String lineNoStr = Integer.toString(lineNo);
line = jedis.hget(lineNoStr, LINE_KEY);
if (line == null) {
RecordId lineId = getRecordId(lineNo);
byte[] buffer = new byte[BLOCK_SIZE];
synchronized (mDataFile) {
mDataFile.seek(lineId.pageNo() * BLOCK_SIZE);
mDataFile.read(buffer);
}
ByteBuffer bb = ByteBuffer.wrap(buffer);
int numRecords = bb.getInt(BLOCK_SIZE - INT_SIZE);
int indexPos = BLOCK_SIZE - 3 * INT_SIZE;
int curLineNo = lineNo - lineId.slotNo() + 1;
String[] recordKeys = {PAGE_NO_KEY, SLOT_NO_KEY};
for (int i = 1; i < numRecords; i++, curLineNo++) {
int offset = bb.getInt(indexPos);
int len = bb.getInt(indexPos + INT_SIZE);
ByteBuffer linebb = ByteBuffer.wrap(buffer, offset, len);
byte[] lineBuf = new byte[linebb.remaining()];
linebb.get(lineBuf);
String lineStr = new String(lineBuf);
if (i == lineId.slotNo()) {
line = lineStr;
}
// Store in cache
lineNoStr = Integer.toString(curLineNo);
jedis.hdel(lineNoStr, recordKeys);
jedis.hset(lineNoStr, LINE_KEY, lineStr);
indexPos -= 2 * INT_SIZE;
}
}
if (line == null) {
throw new Exception("LineServer: Could not find line on page");
}
} catch (IOException ioe) {
System.err.println("LineServer: IOException on line retrieval");
throw ioe;
} finally {
pool_.returnResource(jedis);
}
return line;
}
@Override
public void tearDown() throws Exception {
Jedis jedis = jedisPool.getResource();
try {
jedis.flushDB();
} finally {
jedisPool.returnResource(jedis);
}
super.tearDown();
}