org.elasticsearch.rest.action.cat.RestHealthAction Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.rest.action.cat;
import org.elasticsearch.action.ActionListener;
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.RestChannel;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.XContentThrowableRestResponse;
import org.elasticsearch.rest.action.support.RestTable;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import java.io.IOException;
import java.util.Locale;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestHealthAction extends AbstractCatAction {
@Inject
public RestHealthAction(Settings settings, Client client, RestController controller) {
super(settings, 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) {
ClusterHealthRequest clusterHealthRequest = new ClusterHealthRequest();
client.admin().cluster().health(clusterHealthRequest, new ActionListener() {
@Override
public void onResponse(final ClusterHealthResponse health) {
try {
channel.sendResponse(RestTable.buildResponse(buildTable(health, request), request, channel));
} catch (Throwable t) {
onFailure(t);
}
}
@Override
public void onFailure(Throwable e) {
try {
channel.sendResponse(new XContentThrowableRestResponse(request, e));
} catch (IOException e1) {
logger.error("Failed to send failure response", e1);
}
}
});
}
@Override
Table getTableWithHeader(final RestRequest request) {
Table t = new Table();
t.startHeaders();
t.addCell("epoch", "desc:seconds since 1970-01-01 00:00:00, that the count was executed");
t.addCell("timestamp", "desc:time that the count was executed");
t.addCell("cluster", "desc:cluster name");
t.addCell("status", "desc:health status");
t.addCell("nodeTotal", "text-align:right;desc:total number of nodes");
t.addCell("nodeData", "text-align:right;desc:number of nodes that can store data");
t.addCell("shards", "text-align:right;desc:total number of shards");
t.addCell("pri", "text-align:right;desc:number of primary shards");
t.addCell("relo", "text-align:right;desc:number of relocating nodes");
t.addCell("init", "text-align:right;desc:number of initializing nodes");
t.addCell("unassign", "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() / 1000;
Table t = getTableWithHeader(request);
t.startRow();
t.addCell(time);
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;
}
}