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* Licensed to Elasticsearch under one or more contributor
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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.
*/
package org.elasticsearch.rest.action.admin.cluster.node.info;
import com.google.common.collect.Sets;
import org.elasticsearch.action.admin.cluster.node.info.NodesInfoRequest;
import org.elasticsearch.action.admin.cluster.node.info.NodesInfoResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.rest.*;
import org.elasticsearch.rest.action.support.RestBuilderListener;
import java.util.Set;
import static org.elasticsearch.rest.RestRequest.Method.GET;
/**
*
*/
public class RestNodesInfoAction extends BaseRestHandler {
private final SettingsFilter settingsFilter;
private final static Set<String> ALLOWED_METRICS = Sets.newHashSet("http", "jvm", "network", "os", "plugins", "process", "settings", "thread_pool", "transport");
@Inject
public RestNodesInfoAction(Settings settings, RestController controller, Client client, SettingsFilter settingsFilter) {
super(settings, controller, client);
controller.registerHandler(GET, "/_nodes", this);
// this endpoint is used for metrics, not for nodeIds, like /_nodes/fs
controller.registerHandler(GET, "/_nodes/{nodeId}", this);
controller.registerHandler(GET, "/_nodes/{nodeId}/{metrics}", this);
// added this endpoint to be aligned with stats
controller.registerHandler(GET, "/_nodes/{nodeId}/info/{metrics}", this);
this.settingsFilter = settingsFilter;
}
@Override
public void handleRequest(final RestRequest request, final RestChannel channel, final Client client) {
String[] nodeIds;
Set<String> metrics;
// special case like /_nodes/os (in this case os are metrics and not the nodeId)
// still, /_nodes/_local (or any other node id) should work and be treated as usual
// this means one must differentiate between allowed metrics and arbitrary node ids in the same place
if (request.hasParam("nodeId") && !request.hasParam("metrics")) {
Set<String> metricsOrNodeIds = Strings.splitStringByCommaToSet(request.param("nodeId", "_all"));
boolean isMetricsOnly = ALLOWED_METRICS.containsAll(metricsOrNodeIds);
if (isMetricsOnly) {
nodeIds = new String[]{"_all"};
metrics = metricsOrNodeIds;
} else {
nodeIds = metricsOrNodeIds.toArray(new String[]{});
metrics = Sets.newHashSet("_all");
}
} else {
nodeIds = Strings.splitStringByCommaToArray(request.param("nodeId", "_all"));
metrics = Strings.splitStringByCommaToSet(request.param("metrics", "_all"));
}
final NodesInfoRequest nodesInfoRequest = new NodesInfoRequest(nodeIds);
nodesInfoRequest.listenerThreaded(false);
// shortcut, dont do checks if only all is specified
if (metrics.size() == 1 && metrics.contains("_all")) {
nodesInfoRequest.all();
} else {
nodesInfoRequest.clear();
nodesInfoRequest.settings(metrics.contains("settings"));
nodesInfoRequest.os(metrics.contains("os"));
nodesInfoRequest.process(metrics.contains("process"));
nodesInfoRequest.jvm(metrics.contains("jvm"));
nodesInfoRequest.threadPool(metrics.contains("thread_pool"));
nodesInfoRequest.network(metrics.contains("network"));
nodesInfoRequest.transport(metrics.contains("transport"));
nodesInfoRequest.http(metrics.contains("http"));
nodesInfoRequest.plugins(metrics.contains("plugins"));
}
client.admin().cluster().nodesInfo(nodesInfoRequest, new RestBuilderListener<NodesInfoResponse>(channel) {
@Override
public RestResponse buildResponse(NodesInfoResponse response, XContentBuilder builder) throws Exception {
response.settingsFilter(settingsFilter);
builder.startObject();
response.toXContent(builder, request);
builder.endObject();
return new BytesRestResponse(RestStatus.OK, builder);
}
});
}
}