forked from voldemort/voldemort
/
ClientRequestExecutorPool.java
404 lines (358 loc) · 16.8 KB
/
ClientRequestExecutorPool.java
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/*
* Copyright 2008-2012 LinkedIn, Inc
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package voldemort.store.socket.clientrequest;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import voldemort.VoldemortException;
import voldemort.client.protocol.RequestFormatType;
import voldemort.server.RequestRoutingType;
import voldemort.store.StoreTimeoutException;
import voldemort.store.UnreachableStoreException;
import voldemort.store.nonblockingstore.NonblockingStoreCallback;
import voldemort.store.socket.SocketDestination;
import voldemort.store.socket.SocketStore;
import voldemort.store.socket.SocketStoreFactory;
import voldemort.store.stats.ClientSocketStats;
import voldemort.store.stats.ClientSocketStatsJmx;
import voldemort.utils.JmxUtils;
import voldemort.utils.Time;
import voldemort.utils.Utils;
import voldemort.utils.pool.KeyedResourcePool;
import voldemort.utils.pool.QueuedKeyedResourcePool;
import voldemort.utils.pool.ResourcePoolConfig;
import voldemort.utils.pool.ResourceRequest;
/**
* A pool of {@link ClientRequestExecutor} keyed off the
* {@link SocketDestination}. This is a wrapper around {@link KeyedResourcePool}
* that translates exceptions as well as providing some JMX access.
*
* <p/>
*
* Upon successful construction of this object, a new Thread is started. It is
* terminated upon calling {@link #close()}.
*/
public class ClientRequestExecutorPool implements SocketStoreFactory {
private final QueuedKeyedResourcePool<SocketDestination, ClientRequestExecutor> pool;
private final ClientRequestExecutorFactory factory;
private final ClientSocketStats stats;
private final boolean jmxEnabled;
private final int jmxId;
private final Logger logger = Logger.getLogger(ClientRequestExecutorPool.class);
public ClientRequestExecutorPool(int selectors,
int maxConnectionsPerNode,
int connectionTimeoutMs,
int soTimeoutMs,
int socketBufferSize,
boolean socketKeepAlive,
boolean jmxEnabled,
int jmxId) {
ResourcePoolConfig config = new ResourcePoolConfig().setIsFair(true)
.setMaxPoolSize(maxConnectionsPerNode)
.setMaxInvalidAttempts(maxConnectionsPerNode)
.setTimeout(connectionTimeoutMs,
TimeUnit.MILLISECONDS);
this.jmxEnabled = jmxEnabled;
this.jmxId = jmxId;
if(this.jmxEnabled) {
stats = new ClientSocketStats(jmxId);
JmxUtils.registerMbean(new ClientSocketStatsJmx(stats),
JmxUtils.createObjectName(JmxUtils.getPackageName(this.getClass()),
"aggregated"
+ JmxUtils.getJmxId(this.jmxId)));
} else {
stats = null;
}
this.factory = new ClientRequestExecutorFactory(selectors,
connectionTimeoutMs,
soTimeoutMs,
socketBufferSize,
socketKeepAlive,
stats);
this.pool = new QueuedKeyedResourcePool<SocketDestination, ClientRequestExecutor>(factory,
config);
if(stats != null) {
this.stats.setPool(pool);
}
}
public ClientRequestExecutorPool(int selectors,
int maxConnectionsPerNode,
int connectionTimeoutMs,
int soTimeoutMs,
int socketBufferSize,
boolean socketKeepAlive) {
// JMX bean is disabled by default
this(selectors,
maxConnectionsPerNode,
connectionTimeoutMs,
soTimeoutMs,
socketBufferSize,
socketKeepAlive,
false,
0);
}
public ClientRequestExecutorPool(int maxConnectionsPerNode,
int connectionTimeoutMs,
int soTimeoutMs,
int socketBufferSize) {
// maintain backward compatibility of API
this(2, maxConnectionsPerNode, connectionTimeoutMs, soTimeoutMs, socketBufferSize, false);
}
public ClientRequestExecutorFactory getFactory() {
return factory;
}
public SocketStore create(String storeName,
String hostName,
int port,
RequestFormatType requestFormatType,
RequestRoutingType requestRoutingType) {
SocketDestination dest = new SocketDestination(Utils.notNull(hostName),
port,
requestFormatType);
return new SocketStore(Utils.notNull(storeName),
factory.getTimeout(),
dest,
this,
requestRoutingType);
}
/**
* Checkout a socket from the pool
*
* @param destination The socket destination you want to connect to
* @return The socket
*/
public ClientRequestExecutor checkout(SocketDestination destination) {
// time checkout
long start = System.nanoTime();
ClientRequestExecutor clientRequestExecutor;
try {
clientRequestExecutor = pool.checkout(destination);
} catch(Exception e) {
throw new UnreachableStoreException("Failure while checking out socket for "
+ destination + ": ", e);
} finally {
long end = System.nanoTime();
if(stats != null) {
stats.recordCheckoutTimeUs(destination, (end - start) / Time.NS_PER_US);
}
}
return clientRequestExecutor;
}
/**
* Check the socket back into the pool.
*
* @param destination The socket destination of the socket
* @param clientRequestExecutor The request executor wrapper
*/
public void checkin(SocketDestination destination, ClientRequestExecutor clientRequestExecutor) {
try {
pool.checkin(destination, clientRequestExecutor);
} catch(Exception e) {
throw new VoldemortException("Failure while checking in socket for " + destination
+ ": ", e);
}
}
public void close(SocketDestination destination) {
factory.setLastClosedTimestamp(destination);
pool.close(destination);
}
/**
* Close the socket pool
*/
public void close() {
// unregister MBeans
if(stats != null) {
try {
if(this.jmxEnabled)
JmxUtils.unregisterMbean(JmxUtils.createObjectName(JmxUtils.getPackageName(this.getClass()),
"aggregated"
+ JmxUtils.getJmxId(this.jmxId)));
} catch(Exception e) {}
stats.close();
}
factory.close();
pool.close();
}
public ClientSocketStats getStats() {
return stats;
}
public <T> void submitAsync(SocketDestination destination,
ClientRequest<T> delegate,
NonblockingStoreCallback callback,
long timeoutMs,
String operationName) {
AsyncRequest<T> asyncRequest = new AsyncRequest<T>(destination,
delegate,
callback,
timeoutMs,
operationName);
pool.requestResource(destination, asyncRequest);
return;
}
/**
* Wrap up an asynchronous request and actually issue it once a
* SocketDestination is checked out.
*/
private class AsyncRequest<T> implements ResourceRequest<ClientRequestExecutor> {
private final SocketDestination destination;
public final ClientRequest<T> delegate;
public final NonblockingStoreCallback callback;
public final long timeoutMs;
public final String operationName;
private final long startTimeNs;
public AsyncRequest(SocketDestination destination,
ClientRequest<T> delegate,
NonblockingStoreCallback callback,
long timeoutMs,
String operationName) {
this.destination = destination;
this.delegate = delegate;
this.callback = callback;
this.timeoutMs = timeoutMs;
this.operationName = operationName;
this.startTimeNs = System.nanoTime();
}
public void useResource(ClientRequestExecutor clientRequestExecutor) {
if(logger.isDebugEnabled()) {
logger.debug("Async request start; type: "
+ operationName
+ " requestRef: "
+ System.identityHashCode(delegate)
+ " time: "
// TODO: output startTimeNs instead?
+ System.currentTimeMillis()
+ " server: "
+ clientRequestExecutor.getSocketChannel()
.socket()
.getRemoteSocketAddress() + " local socket: "
+ clientRequestExecutor.getSocketChannel().socket().getLocalAddress()
+ ":"
+ clientRequestExecutor.getSocketChannel().socket().getLocalPort());
}
NonblockingStoreCallbackClientRequest<T> clientRequest = new NonblockingStoreCallbackClientRequest<T>(destination,
delegate,
clientRequestExecutor,
callback);
clientRequestExecutor.addClientRequest(clientRequest, timeoutMs);
}
public void handleTimeout() {
long durationNs = System.nanoTime() - startTimeNs;
handleException(new TimeoutException("Could not acquire resource in " + timeoutMs
+ " ms. (Took " + durationNs + " ns.)"));
}
public void handleException(Exception e) {
if(!(e instanceof UnreachableStoreException))
e = new UnreachableStoreException("Failure in " + operationName + ": "
+ e.getMessage(), e);
try {
callback.requestComplete(e, 0);
} catch(Exception ex) {
if(logger.isEnabledFor(Level.WARN))
logger.warn(ex, ex);
}
}
public long getDeadlineNs() {
return startTimeNs + TimeUnit.MILLISECONDS.toNanos(timeoutMs);
}
}
private class NonblockingStoreCallbackClientRequest<T> implements ClientRequest<T> {
private final SocketDestination destination;
private final ClientRequest<T> clientRequest;
private final ClientRequestExecutor clientRequestExecutor;
private final NonblockingStoreCallback callback;
private final long startNs;
private volatile boolean isComplete;
public NonblockingStoreCallbackClientRequest(SocketDestination destination,
ClientRequest<T> clientRequest,
ClientRequestExecutor clientRequestExecutor,
NonblockingStoreCallback callback) {
this.destination = destination;
this.clientRequest = clientRequest;
this.clientRequestExecutor = clientRequestExecutor;
this.callback = callback;
this.startNs = System.nanoTime();
}
private void invokeCallback(Object o, long requestTime) {
if(callback != null) {
try {
if(logger.isDebugEnabled()) {
logger.debug("Async request end; requestRef: "
+ System.identityHashCode(clientRequest)
+ " time: "
+ System.currentTimeMillis()
+ " server: "
+ clientRequestExecutor.getSocketChannel()
.socket()
.getRemoteSocketAddress()
+ " local socket: "
+ clientRequestExecutor.getSocketChannel()
.socket()
.getLocalAddress()
+ ":"
+ clientRequestExecutor.getSocketChannel()
.socket()
.getLocalPort() + " result: " + o);
}
callback.requestComplete(o, requestTime);
} catch(Exception e) {
if(logger.isEnabledFor(Level.WARN))
logger.warn(e, e);
}
}
}
public void complete() {
try {
clientRequest.complete();
Object result = clientRequest.getResult();
invokeCallback(result, (System.nanoTime() - startNs) / Time.NS_PER_MS);
} catch(Exception e) {
invokeCallback(e, (System.nanoTime() - startNs) / Time.NS_PER_MS);
} finally {
checkin(destination, clientRequestExecutor);
isComplete = true;
}
}
public boolean isComplete() {
return isComplete;
}
public boolean formatRequest(DataOutputStream outputStream) {
return clientRequest.formatRequest(outputStream);
}
public T getResult() throws VoldemortException, IOException {
return clientRequest.getResult();
}
public boolean isCompleteResponse(ByteBuffer buffer) {
return clientRequest.isCompleteResponse(buffer);
}
public void parseResponse(DataInputStream inputStream) {
clientRequest.parseResponse(inputStream);
}
public void timeOut() {
clientRequest.timeOut();
invokeCallback(new StoreTimeoutException("ClientRequestExecutor timed out. Cannot complete request."),
(System.nanoTime() - startNs) / Time.NS_PER_MS);
checkin(destination, clientRequestExecutor);
}
public boolean isTimedOut() {
return clientRequest.isTimedOut();
}
}
}