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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
* under the License.
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package org.elasticsearch.rest.action.cat;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequest;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.client.Client;
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 org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import java.util.Locale;
import java.util.concurrent.TimeUnit;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestHealthAction extends AbstractCatAction {
@Inject
public RestHealthAction(Settings settings, RestController controller, Client client) {
super(settings, controller, client);
controller.registerHandler(GET, "/_cat/health", this);
}
@Override
void documentation(StringBuilder sb) {
sb.append("/_cat/health\n");
}
@Override
public void doRequest(final RestRequest request, final RestChannel channel, final Client client) {
ClusterHealthRequest clusterHealthRequest = new ClusterHealthRequest();
client.admin().cluster().health(clusterHealthRequest, new RestResponseListener<ClusterHealthResponse>(channel) {
@Override
public RestResponse buildResponse(final ClusterHealthResponse health) throws Exception {
return RestTable.buildResponse(buildTable(health, request), channel);
}
});
}
@Override
Table getTableWithHeader(final RestRequest request) {
Table t = new Table();
t.startHeaders();
t.addCell("epoch", "alias:t,time;desc:seconds since 1970-01-01 00:00:00");
t.addCell("timestamp", "alias:ts,hms,hhmmss;desc:time in HH:MM:SS");
t.addCell("cluster", "alias:cl;desc:cluster name");
t.addCell("status", "alias:st;desc:health status");
t.addCell("node.total", "alias:nt,nodeTotal;text-align:right;desc:total number of nodes");
t.addCell("node.data", "alias:nd,nodeData;text-align:right;desc:number of nodes that can store data");
t.addCell("shards", "alias:t,sh,shards.total,shardsTotal;text-align:right;desc:total number of shards");
t.addCell("pri", "alias:p,shards.primary,shardsPrimary;text-align:right;desc:number of primary shards");
t.addCell("relo", "alias:r,shards.relocating,shardsRelocating;text-align:right;desc:number of relocating nodes");
t.addCell("init", "alias:i,shards.initializing,shardsInitializing;text-align:right;desc:number of initializing nodes");
t.addCell("unassign", "alias:u,shards.unassigned,shardsUnassigned;text-align:right;desc:number of unassigned shards");
t.endHeaders();
return t;
}
private DateTimeFormatter dateFormat = DateTimeFormat.forPattern("HH:mm:ss");
private Table buildTable(final ClusterHealthResponse health, final RestRequest request) {
long time = System.currentTimeMillis();
Table t = getTableWithHeader(request);
t.startRow();
t.addCell(TimeUnit.SECONDS.convert(time, TimeUnit.MILLISECONDS));
t.addCell(dateFormat.print(time));
t.addCell(health.getClusterName());
t.addCell(health.getStatus().name().toLowerCase(Locale.ROOT));
t.addCell(health.getNumberOfNodes());
t.addCell(health.getNumberOfDataNodes());
t.addCell(health.getActiveShards());
t.addCell(health.getActivePrimaryShards());
t.addCell(health.getRelocatingShards());
t.addCell(health.getInitializingShards());
t.addCell(health.getUnassignedShards());
t.endRow();
return t;
}
}