org.elasticsearch.rest.action.admin.cluster.RestClusterAllocationExplainAction Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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.rest.action.admin.cluster;
import org.elasticsearch.action.admin.cluster.allocation.ClusterAllocationExplainRequest;
import org.elasticsearch.action.admin.cluster.allocation.ClusterAllocationExplainResponse;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.rest.action.RestBuilderListener;
import java.io.IOException;
import java.util.List;
import static java.util.Arrays.asList;
import static java.util.Collections.unmodifiableList;
import static org.elasticsearch.rest.RestRequest.Method.GET;
import static org.elasticsearch.rest.RestRequest.Method.POST;
/**
* Class handling cluster allocation explanation at the REST level
*/
public class RestClusterAllocationExplainAction extends BaseRestHandler {
@Override
public List routes() {
return unmodifiableList(asList(
new Route(GET, "/_cluster/allocation/explain"),
new Route(POST, "/_cluster/allocation/explain")));
}
@Override
public String getName() {
return "cluster_allocation_explain_action";
}
@Override
public boolean allowSystemIndexAccessByDefault() {
return true;
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
ClusterAllocationExplainRequest req;
if (request.hasContentOrSourceParam() == false) {
// Empty request signals "explain the first unassigned shard you find"
req = new ClusterAllocationExplainRequest();
} else {
try (XContentParser parser = request.contentOrSourceParamParser()) {
req = ClusterAllocationExplainRequest.parse(parser);
}
}
req.includeYesDecisions(request.paramAsBoolean("include_yes_decisions", false));
req.includeDiskInfo(request.paramAsBoolean("include_disk_info", false));
return channel -> client.admin().cluster().allocationExplain(req,
new RestBuilderListener(channel) {
@Override
public RestResponse buildResponse(ClusterAllocationExplainResponse response, XContentBuilder builder) throws IOException {
response.getExplanation().toXContent(builder, ToXContent.EMPTY_PARAMS);
return new BytesRestResponse(RestStatus.OK, builder);
}
});
}
}