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/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.
*/
/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.client.node;
import org.opensearch.action.ActionType;
import org.opensearch.action.ActionListener;
import org.opensearch.action.ActionRequest;
import org.opensearch.action.ActionResponse;
import org.opensearch.action.support.TransportAction;
import org.opensearch.client.Client;
import org.opensearch.client.support.AbstractClient;
import org.opensearch.cluster.node.DiscoveryNode;
import org.opensearch.common.io.stream.NamedWriteableRegistry;
import org.opensearch.common.settings.Settings;
import org.opensearch.tasks.Task;
import org.opensearch.tasks.TaskListener;
import org.opensearch.threadpool.ThreadPool;
import org.opensearch.transport.RemoteClusterService;
import java.util.Map;
import java.util.function.Supplier;
/**
* Client that executes actions on the local node.
*/
public class NodeClient extends AbstractClient {
private Map actions;
/**
* The id of the local {@link DiscoveryNode}. Useful for generating task ids from tasks returned by
* {@link #executeLocally(ActionType, ActionRequest, TaskListener)}.
*/
private Supplier localNodeId;
private RemoteClusterService remoteClusterService;
private NamedWriteableRegistry namedWriteableRegistry;
public NodeClient(Settings settings, ThreadPool threadPool) {
super(settings, threadPool);
}
public void initialize(
Map actions,
Supplier localNodeId,
RemoteClusterService remoteClusterService,
NamedWriteableRegistry namedWriteableRegistry
) {
this.actions = actions;
this.localNodeId = localNodeId;
this.remoteClusterService = remoteClusterService;
this.namedWriteableRegistry = namedWriteableRegistry;
}
@Override
public void close() {
// nothing really to do
}
@Override
public void doExecute(
ActionType action,
Request request,
ActionListener listener
) {
// Discard the task because the Client interface doesn't use it.
executeLocally(action, request, listener);
}
/**
* Execute an {@link ActionType} locally, returning that {@link Task} used to track it, and linking an {@link ActionListener}.
* Prefer this method if you don't need access to the task when listening for the response. This is the method used to implement
* the {@link Client} interface.
*/
public Task executeLocally(
ActionType action,
Request request,
ActionListener listener
) {
return transportAction(action).execute(request, listener);
}
/**
* Execute an {@link ActionType} locally, returning that {@link Task} used to track it, and linking an {@link TaskListener}. Prefer this
* method if you need access to the task when listening for the response.
*/
public Task executeLocally(
ActionType action,
Request request,
TaskListener listener
) {
return transportAction(action).execute(request, listener);
}
/**
* The id of the local {@link DiscoveryNode}. Useful for generating task ids from tasks returned by
* {@link #executeLocally(ActionType, ActionRequest, TaskListener)}.
*/
public String getLocalNodeId() {
return localNodeId.get();
}
/**
* Get the {@link TransportAction} for an {@link ActionType}, throwing exceptions if the action isn't available.
*/
@SuppressWarnings("unchecked")
private TransportAction transportAction(
ActionType action
) {
if (actions == null) {
throw new IllegalStateException("NodeClient has not been initialized");
}
TransportAction transportAction = actions.get(action);
if (transportAction == null) {
throw new IllegalStateException("failed to find action [" + action + "] to execute");
}
return transportAction;
}
@Override
public Client getRemoteClusterClient(String clusterAlias) {
return remoteClusterService.getRemoteClusterClient(threadPool(), clusterAlias);
}
public NamedWriteableRegistry getNamedWriteableRegistry() {
return namedWriteableRegistry;
}
}