forked from elastic/elasticsearch
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
7 changed files
with
86 additions
and
43 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
68 changes: 68 additions & 0 deletions
68
server/src/main/java/org/elasticsearch/action/search/RemoteClusterActionListener.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0 and the Server Side Public License, v 1; you may not use this file except | ||
| * in compliance with, at your election, the Elastic License 2.0 or the Server | ||
| * Side Public License, v 1. | ||
| */ | ||
| package org.elasticsearch.action.search; | ||
|
|
||
| import org.elasticsearch.action.ActionListener; | ||
| import org.elasticsearch.action.DelegatingActionListener; | ||
| import org.elasticsearch.common.util.concurrent.CountDown; | ||
|
|
||
| import java.util.Map; | ||
| import java.util.concurrent.ConcurrentHashMap; | ||
| import java.util.concurrent.atomic.AtomicReference; | ||
|
|
||
| /** | ||
| * Action listener for operations that are performed on a group of remote clusters. | ||
| * It will wait for all operations to complete and then delegate to the upstream listener. | ||
| * Does not fail if one of the operations fails. | ||
| * <br> | ||
| * Returns a map of the results per cluster name via {@link #remoteListener(String)} method. | ||
| * This is the listener that should be used to perform the individual operation on the remote cluster. | ||
| * | ||
| * @param <T> the type of the individual per-cluster result | ||
| */ | ||
| public class RemoteClusterActionListener<T> extends DelegatingActionListener<T, Map<String, T>> { | ||
| private final CountDown countDown; | ||
| private final Map<String, T> results; | ||
| private final AtomicReference<Exception> failure = new AtomicReference<>(); | ||
|
|
||
| public RemoteClusterActionListener(int groupSize, ActionListener<Map<String, T>> delegate) { | ||
| super(delegate); | ||
| if (groupSize <= 0) { | ||
| assert false : "illegal group size [" + groupSize + "]"; | ||
| throw new IllegalArgumentException("groupSize must be greater than 0 but was " + groupSize); | ||
| } | ||
| results = new ConcurrentHashMap<>(groupSize); | ||
| countDown = new CountDown(groupSize); | ||
| } | ||
|
|
||
| public ActionListener<T> remoteListener(String clusterAlias) { | ||
| return delegateFailure((l, r) -> { | ||
| results.put(clusterAlias, r); | ||
| l.onResponse(r); | ||
| }); | ||
| } | ||
|
|
||
| @Override | ||
| public void onResponse(T element) { | ||
| if (countDown.countDown()) { | ||
| delegate.onResponse(results); | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void onFailure(Exception e) { | ||
| // TODO: how do we report the failures? | ||
| final var firstException = failure.compareAndExchange(null, e); | ||
| if (firstException != null && firstException != e) { | ||
| firstException.addSuppressed(e); | ||
| } | ||
| if (countDown.countDown()) { | ||
| delegate.onResponse(results); | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters