/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.executor.transport.task.elasticsearch;
import com.google.common.util.concurrent.SettableFuture;
import io.crate.Constants;
import io.crate.executor.TaskResult;
import io.crate.executor.transport.task.AsyncChainedTask;
import io.crate.planner.node.dml.ESDeleteNode;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.delete.DeleteRequest;
import org.elasticsearch.action.delete.DeleteResponse;
import org.elasticsearch.action.delete.TransportDeleteAction;
import org.elasticsearch.index.engine.VersionConflictEngineException;
public class ESDeleteTask extends AsyncChainedTask {
private final TransportDeleteAction transport;
private final DeleteRequest request;
private final ActionListener<DeleteResponse> listener;
public ESDeleteTask(TransportDeleteAction transport, ESDeleteNode node) {
this.transport = transport;
request = new DeleteRequest(node.index(), Constants.DEFAULT_MAPPING_TYPE, node.id());
request.routing(node.routing());
if (node.version().isPresent()) {
request.version(node.version().get());
}
listener = new DeleteResponseListener(result);
}
static class DeleteResponseListener implements ActionListener<DeleteResponse> {
private final SettableFuture<TaskResult> result;
public DeleteResponseListener(SettableFuture<TaskResult> result) {
this.result = result;
}
@Override
public void onResponse(DeleteResponse response) {
if (!response.isFound()) {
result.set(TaskResult.ZERO);
} else {
result.set(TaskResult.ONE_ROW);
}
}
@Override
public void onFailure(Throwable e) {
Throwable cause = e.getCause();
// if the delete Operation was done locally (on the same node) e is the real exception
// otherwise the exception is wrapped inside a transportExecutionException
if (e instanceof VersionConflictEngineException || (cause != null && cause instanceof VersionConflictEngineException)) {
// treat version conflict as rows affected = 0
result.set(TaskResult.ZERO);
} else {
result.setException(e);
}
}
}
@Override
public void start() {
transport.execute(request, listener);
}
}