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Elasticsearch subproject :server
/*
* 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.
*/
package org.elasticsearch.persistent;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionRequestValidationException;
import org.elasticsearch.action.ActionType;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.MasterNodeOperationRequestBuilder;
import org.elasticsearch.action.support.master.MasterNodeRequest;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.client.ElasticsearchClient;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.common.io.stream.StreamOutput;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.Objects;
import static org.elasticsearch.action.ValidateActions.addValidationError;
/**
* ActionType that is used by executor node to indicate that the persistent action finished or failed on the node and needs to be
* removed from the cluster state in case of successful completion or restarted on some other node in case of failure.
*/
public class CompletionPersistentTaskAction extends ActionType {
public static final CompletionPersistentTaskAction INSTANCE = new CompletionPersistentTaskAction();
public static final String NAME = "cluster:admin/persistent/completion";
private CompletionPersistentTaskAction() {
super(NAME, PersistentTaskResponse::new);
}
public static class Request extends MasterNodeRequest {
private String taskId;
private Exception exception;
private long allocationId = -1;
public Request() {}
public Request(StreamInput in) throws IOException {
super(in);
taskId = in.readString();
allocationId = in.readLong();
exception = in.readException();
}
public Request(String taskId, long allocationId, Exception exception) {
this.taskId = taskId;
this.exception = exception;
this.allocationId = allocationId;
}
@Override
public void writeTo(StreamOutput out) throws IOException {
super.writeTo(out);
out.writeString(taskId);
out.writeLong(allocationId);
out.writeException(exception);
}
@Override
public ActionRequestValidationException validate() {
ActionRequestValidationException validationException = null;
if (taskId == null) {
validationException = addValidationError("task id is missing", validationException);
}
if (allocationId < 0) {
validationException = addValidationError("allocation id is negative or missing", validationException);
}
return validationException;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Request request = (Request) o;
return Objects.equals(taskId, request.taskId) &&
allocationId == request.allocationId &&
Objects.equals(exception, request.exception);
}
@Override
public int hashCode() {
return Objects.hash(taskId, allocationId, exception);
}
}
public static class RequestBuilder extends MasterNodeOperationRequestBuilder {
protected RequestBuilder(ElasticsearchClient client, CompletionPersistentTaskAction action) {
super(client, action, new Request());
}
}
public static class TransportAction extends TransportMasterNodeAction {
private final PersistentTasksClusterService persistentTasksClusterService;
@Inject
public TransportAction(TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, ActionFilters actionFilters,
PersistentTasksClusterService persistentTasksClusterService,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(CompletionPersistentTaskAction.NAME, transportService, clusterService, threadPool, actionFilters,
Request::new, indexNameExpressionResolver);
this.persistentTasksClusterService = persistentTasksClusterService;
}
@Override
protected String executor() {
return ThreadPool.Names.GENERIC;
}
@Override
protected PersistentTaskResponse read(StreamInput in) throws IOException {
return new PersistentTaskResponse(in);
}
@Override
protected ClusterBlockException checkBlock(Request request, ClusterState state) {
// Cluster is not affected but we look up repositories in metadata
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
@Override
protected final void masterOperation(final Request request, ClusterState state,
final ActionListener listener) {
persistentTasksClusterService.completePersistentTask(request.taskId, request.allocationId, request.exception,
ActionListener.delegateFailure(listener,
(delegatedListener, task) -> delegatedListener.onResponse(new PersistentTaskResponse(task))));
}
}
}