org.elasticsearch.action.bulk.BulkProcessor Maven / Gradle / Ivy
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* the Apache License, Version 2.0 (the "License"); you may
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
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package org.elasticsearch.action.bulk;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequest;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.unit.ByteSizeUnit;
import org.elasticsearch.common.unit.ByteSizeValue;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.util.concurrent.EsExecutors;
import org.elasticsearch.common.util.concurrent.FutureUtils;
import java.io.Closeable;
import java.util.concurrent.*;
import java.util.concurrent.atomic.AtomicLong;
/**
* A bulk processor is a thread safe bulk processing class, allowing to easily set when to "flush" a new bulk request
* (either based on number of actions, based on the size, or time), and to easily control the number of concurrent bulk
* requests allowed to be executed in parallel.
*
* In order to create a new bulk processor, use the {@link Builder}.
*/
public class BulkProcessor implements Closeable {
/**
* A listener for the execution.
*/
public static interface Listener {
/**
* Callback before the bulk is executed.
*/
void beforeBulk(long executionId, BulkRequest request);
/**
* Callback after a successful execution of bulk request.
*/
void afterBulk(long executionId, BulkRequest request, BulkResponse response);
/**
* Callback after a failed execution of bulk request.
*/
void afterBulk(long executionId, BulkRequest request, Throwable failure);
}
/**
* A builder used to create a build an instance of a bulk processor.
*/
public static class Builder {
private final Client client;
private final Listener listener;
private String name;
private int concurrentRequests = 1;
private int bulkActions = 1000;
private ByteSizeValue bulkSize = new ByteSizeValue(5, ByteSizeUnit.MB);
private TimeValue flushInterval = null;
/**
* Creates a builder of bulk processor with the client to use and the listener that will be used
* to be notified on the completion of bulk requests.
*/
public Builder(Client client, Listener listener) {
this.client = client;
this.listener = listener;
}
/**
* Sets an optional name to identify this bulk processor.
*/
public Builder setName(String name) {
this.name = name;
return this;
}
/**
* Sets the number of concurrent requests allowed to be executed. A value of 0 means that only a single
* request will be allowed to be executed. A value of 1 means 1 concurrent request is allowed to be executed
* while accumulating new bulk requests. Defaults to 1.
*/
public Builder setConcurrentRequests(int concurrentRequests) {
this.concurrentRequests = concurrentRequests;
return this;
}
/**
* Sets when to flush a new bulk request based on the number of actions currently added. Defaults to
* 1000. Can be set to -1 to disable it.
*/
public Builder setBulkActions(int bulkActions) {
this.bulkActions = bulkActions;
return this;
}
/**
* Sets when to flush a new bulk request based on the size of actions currently added. Defaults to
* 5mb. Can be set to -1 to disable it.
*/
public Builder setBulkSize(ByteSizeValue bulkSize) {
this.bulkSize = bulkSize;
return this;
}
/**
* Sets a flush interval flushing *any* bulk actions pending if the interval passes. Defaults to not set.
*
* Note, both {@link #setBulkActions(int)} and {@link #setBulkSize(org.elasticsearch.common.unit.ByteSizeValue)}
* can be set to -1 with the flush interval set allowing for complete async processing of bulk actions.
*/
public Builder setFlushInterval(TimeValue flushInterval) {
this.flushInterval = flushInterval;
return this;
}
/**
* Builds a new bulk processor.
*/
public BulkProcessor build() {
return new BulkProcessor(client, listener, name, concurrentRequests, bulkActions, bulkSize, flushInterval);
}
}
public static Builder builder(Client client, Listener listener) {
return new Builder(client, listener);
}
private final Client client;
private final Listener listener;
private final String name;
private final int concurrentRequests;
private final int bulkActions;
private final long bulkSize;
private final TimeValue flushInterval;
private final Semaphore semaphore;
private final ScheduledThreadPoolExecutor scheduler;
private final ScheduledFuture scheduledFuture;
private final AtomicLong executionIdGen = new AtomicLong();
private BulkRequest bulkRequest;
private volatile boolean closed = false;
BulkProcessor(Client client, Listener listener, @Nullable String name, int concurrentRequests, int bulkActions, ByteSizeValue bulkSize, @Nullable TimeValue flushInterval) {
this.client = client;
this.listener = listener;
this.name = name;
this.concurrentRequests = concurrentRequests;
this.bulkActions = bulkActions;
this.bulkSize = bulkSize.bytes();
this.semaphore = new Semaphore(concurrentRequests);
this.bulkRequest = new BulkRequest();
this.flushInterval = flushInterval;
if (flushInterval != null) {
this.scheduler = (ScheduledThreadPoolExecutor) Executors.newScheduledThreadPool(1, EsExecutors.daemonThreadFactory(client.settings(), (name != null ? "[" + name + "]" : "") + "bulk_processor"));
this.scheduler.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
this.scheduler.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
this.scheduledFuture = this.scheduler.scheduleWithFixedDelay(new Flush(), flushInterval.millis(), flushInterval.millis(), TimeUnit.MILLISECONDS);
} else {
this.scheduler = null;
this.scheduledFuture = null;
}
}
/**
* Closes the processor. If flushing by time is enabled, then it's shutdown. Any remaining bulk actions are flushed.
*/
@Override
public void close() {
try {
awaitClose(0, TimeUnit.NANOSECONDS);
} catch(InterruptedException exc) {
Thread.currentThread().interrupt();
}
}
/**
* Closes the processor. If flushing by time is enabled, then it's shutdown. Any remaining bulk actions are flushed.
*
* If concurrent requests are not enabled, returns {@code true} immediately.
* If concurrent requests are enabled, waits for up to the specified timeout for all bulk requests to complete then returns {@code true},
* If the specified waiting time elapses before all bulk requests complete, {@code false} is returned.
*
* @param timeout The maximum time to wait for the bulk requests to complete
* @param unit The time unit of the {@code timeout} argument
* @return {@code true} if all bulk requests completed and {@code false} if the waiting time elapsed before all the bulk requests completed
* @throws InterruptedException If the current thread is interrupted
*/
public synchronized boolean awaitClose(long timeout, TimeUnit unit) throws InterruptedException {
if (closed) {
return true;
}
closed = true;
if (this.scheduledFuture != null) {
FutureUtils.cancel(this.scheduledFuture);
this.scheduler.shutdown();
}
if (bulkRequest.numberOfActions() > 0) {
execute();
}
if (this.concurrentRequests < 1) {
return true;
}
if (semaphore.tryAcquire(this.concurrentRequests, timeout, unit)) {
semaphore.release(this.concurrentRequests);
return true;
}
return false;
}
/**
* Adds an {@link IndexRequest} to the list of actions to execute. Follows the same behavior of {@link IndexRequest}
* (for example, if no id is provided, one will be generated, or usage of the create flag).
*/
public BulkProcessor add(IndexRequest request) {
return add((ActionRequest) request);
}
/**
* Adds an {@link DeleteRequest} to the list of actions to execute.
*/
public BulkProcessor add(DeleteRequest request) {
return add((ActionRequest) request);
}
/**
* Adds either a delete or an index request.
*/
public BulkProcessor add(ActionRequest request) {
return add(request, null);
}
public BulkProcessor add(ActionRequest request, @Nullable Object payload) {
internalAdd(request, payload);
return this;
}
boolean isOpen() {
return closed == false;
}
protected void ensureOpen() {
if (closed) {
throw new IllegalStateException("bulk process already closed");
}
}
private synchronized void internalAdd(ActionRequest request, @Nullable Object payload) {
ensureOpen();
bulkRequest.add(request, payload);
executeIfNeeded();
}
public BulkProcessor add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType) throws Exception {
return add(data, defaultIndex, defaultType, null);
}
public synchronized BulkProcessor add(BytesReference data, @Nullable String defaultIndex, @Nullable String defaultType, @Nullable Object payload) throws Exception {
bulkRequest.add(data, defaultIndex, defaultType, null, null, payload, true);
executeIfNeeded();
return this;
}
private void executeIfNeeded() {
ensureOpen();
if (!isOverTheLimit()) {
return;
}
execute();
}
// (currently) needs to be executed under a lock
private void execute() {
final BulkRequest bulkRequest = this.bulkRequest;
final long executionId = executionIdGen.incrementAndGet();
this.bulkRequest = new BulkRequest();
if (concurrentRequests == 0) {
// execute in a blocking fashion...
boolean afterCalled = false;
try {
listener.beforeBulk(executionId, bulkRequest);
BulkResponse bulkItemResponses = client.bulk(bulkRequest).actionGet();
afterCalled = true;
listener.afterBulk(executionId, bulkRequest, bulkItemResponses);
} catch (Exception e) {
if (!afterCalled) {
listener.afterBulk(executionId, bulkRequest, e);
}
}
} else {
boolean success = false;
try {
listener.beforeBulk(executionId, bulkRequest);
semaphore.acquire();
client.bulk(bulkRequest, new ActionListener() {
@Override
public void onResponse(BulkResponse response) {
try {
listener.afterBulk(executionId, bulkRequest, response);
} finally {
semaphore.release();
}
}
@Override
public void onFailure(Throwable e) {
try {
listener.afterBulk(executionId, bulkRequest, e);
} finally {
semaphore.release();
}
}
});
success = true;
} catch (InterruptedException e) {
Thread.interrupted();
listener.afterBulk(executionId, bulkRequest, e);
} catch (Throwable t) {
listener.afterBulk(executionId, bulkRequest, t);
} finally {
if (!success) { // if we fail on client.bulk() release the semaphore
semaphore.release();
}
}
}
}
private boolean isOverTheLimit() {
if (bulkActions != -1 && bulkRequest.numberOfActions() >= bulkActions) {
return true;
}
if (bulkSize != -1 && bulkRequest.estimatedSizeInBytes() >= bulkSize) {
return true;
}
return false;
}
/**
* Flush pending delete or index requests.
*/
public synchronized void flush() {
ensureOpen();
if (bulkRequest.numberOfActions() > 0) {
execute();
}
}
class Flush implements Runnable {
@Override
public void run() {
synchronized (BulkProcessor.this) {
if (closed) {
return;
}
if (bulkRequest.numberOfActions() == 0) {
return;
}
execute();
}
}
}
}
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