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* 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
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package org.elasticsearch.rest.action.cat;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.admin.cluster.state.ClusterStateResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.Table;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestResponseListener;
import org.elasticsearch.rest.action.support.RestTable;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestMasterAction extends AbstractCatAction {
@Inject
public RestMasterAction(Settings settings, RestController controller, Client client) {
super(settings, controller, client);
controller.registerHandler(GET, "/_cat/master", this);
}
@Override
void documentation(StringBuilder sb) {
sb.append("/_cat/master\n");
}
@Override
public void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
final ClusterStateRequest clusterStateRequest = new ClusterStateRequest();
clusterStateRequest.clear().nodes(true);
clusterStateRequest.local(request.paramAsBoolean("local", clusterStateRequest.local()));
clusterStateRequest.masterNodeTimeout(request.paramAsTime("master_timeout", clusterStateRequest.masterNodeTimeout()));
client.admin().cluster().state(clusterStateRequest, new RestResponseListener<ClusterStateResponse>(channel) {
@Override
public RestResponse buildResponse(final ClusterStateResponse clusterStateResponse) throws Exception {
return RestTable.buildResponse(buildTable(request, clusterStateResponse), channel);
}
});
}
@Override
Table getTableWithHeader(final RestRequest request) {
Table table = new Table();
table.startHeaders()
.addCell("id", "desc:node id")
.addCell("host", "alias:h;desc:host name")
.addCell("ip", "desc:ip address ")
.addCell("node", "alias:n;desc:node name")
.endHeaders();
return table;
}
private Table buildTable(RestRequest request, ClusterStateResponse state) {
Table table = getTableWithHeader(request);
DiscoveryNodes nodes = state.getState().nodes();
table.startRow();
DiscoveryNode master = nodes.get(nodes.masterNodeId());
if (master == null) {
table.addCell("-");
table.addCell("-");
table.addCell("-");
table.addCell("-");
} else {
table.addCell(master.getId());
table.addCell(master.getHostName());
table.addCell(master.getHostAddress());
table.addCell(master.getName());
}
table.endRow();
return table;
}
}