RestNodesHotThreadsAction.java example

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elasticsearch-master
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 * this work for additional information regarding copyright
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 * the Apache License, Version 2.0 (the "License"); you may
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 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
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package org.elasticsearch.rest.action.admin.cluster;

import org.elasticsearch.action.admin.cluster.node.hotthreads.NodeHotThreads;
import org.elasticsearch.action.admin.cluster.node.hotthreads.NodesHotThreadsRequest;
import org.elasticsearch.action.admin.cluster.node.hotthreads.NodesHotThreadsResponse;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.BytesRestResponse;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.RestResponse;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.rest.action.RestResponseListener;

import java.io.IOException;


public class RestNodesHotThreadsAction extends BaseRestHandler {
    public RestNodesHotThreadsAction(Settings settings, RestController controller) {
        super(settings);
        controller.registerHandler(RestRequest.Method.GET, "/_cluster/nodes/hotthreads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_cluster/nodes/hot_threads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_cluster/nodes/{nodeId}/hotthreads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_cluster/nodes/{nodeId}/hot_threads", this);

        controller.registerHandler(RestRequest.Method.GET, "/_nodes/hotthreads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_nodes/hot_threads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_nodes/{nodeId}/hotthreads", this);
        controller.registerHandler(RestRequest.Method.GET, "/_nodes/{nodeId}/hot_threads", this);
    }

    @Override
    public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
        String[] nodesIds = Strings.splitStringByCommaToArray(request.param("nodeId"));
        NodesHotThreadsRequest nodesHotThreadsRequest = new NodesHotThreadsRequest(nodesIds);
        nodesHotThreadsRequest.threads(request.paramAsInt("threads", nodesHotThreadsRequest.threads()));
        nodesHotThreadsRequest.ignoreIdleThreads(request.paramAsBoolean("ignore_idle_threads", nodesHotThreadsRequest.ignoreIdleThreads()));
        nodesHotThreadsRequest.type(request.param("type", nodesHotThreadsRequest.type()));
        nodesHotThreadsRequest.interval(TimeValue.parseTimeValue(request.param("interval"), nodesHotThreadsRequest.interval(), "interval"));
        nodesHotThreadsRequest.snapshots(request.paramAsInt("snapshots", nodesHotThreadsRequest.snapshots()));
        nodesHotThreadsRequest.timeout(request.param("timeout"));
        return channel -> client.admin().cluster().nodesHotThreads(
                nodesHotThreadsRequest,
                new RestResponseListener<NodesHotThreadsResponse>(channel) {
                    @Override
                    public RestResponse buildResponse(NodesHotThreadsResponse response) throws Exception {
                        StringBuilder sb = new StringBuilder();
                        for (NodeHotThreads node : response.getNodes()) {
                            sb.append("::: ").append(node.getNode().toString()).append("\n");
                            Strings.spaceify(3, node.getHotThreads(), sb);
                            sb.append('\n');
                        }
                        return new BytesRestResponse(RestStatus.OK, sb.toString());
                    }
                });
    }

    @Override
    public boolean canTripCircuitBreaker() {
        return false;
    }
}