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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* 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;
import org.elasticsearch.action.admin.cluster.node.stats.NodesStatsRequest;
import org.elasticsearch.action.admin.indices.stats.CommonStatsFlags;
import org.elasticsearch.action.admin.indices.stats.CommonStatsFlags.Flag;
import org.elasticsearch.client.node.NodeClient;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestController;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestActions.NodesResponseRestListener;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.function.Consumer;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestNodesStatsAction extends BaseRestHandler {
public RestNodesStatsAction(Settings settings, RestController controller) {
super(settings);
controller.registerHandler(GET, "/_nodes/stats", this);
controller.registerHandler(GET, "/_nodes/{nodeId}/stats", this);
controller.registerHandler(GET, "/_nodes/stats/{metric}", this);
controller.registerHandler(GET, "/_nodes/{nodeId}/stats/{metric}", this);
controller.registerHandler(GET, "/_nodes/stats/{metric}/{index_metric}", this);
controller.registerHandler(GET, "/_nodes/{nodeId}/stats/{metric}/{index_metric}", this);
}
static final Map<String, Consumer<NodesStatsRequest>> METRICS;
static {
final Map<String, Consumer<NodesStatsRequest>> metrics = new HashMap<>();
metrics.put("os", r -> r.os(true));
metrics.put("jvm", r -> r.jvm(true));
metrics.put("thread_pool", r -> r.threadPool(true));
metrics.put("fs", r -> r.fs(true));
metrics.put("transport", r -> r.transport(true));
metrics.put("http", r -> r.http(true));
metrics.put("indices", r -> r.indices(true));
metrics.put("process", r -> r.process(true));
metrics.put("breaker", r -> r.breaker(true));
metrics.put("script", r -> r.script(true));
metrics.put("discovery", r -> r.discovery(true));
metrics.put("ingest", r -> r.ingest(true));
METRICS = Collections.unmodifiableMap(metrics);
}
static final Map<String, Consumer<CommonStatsFlags>> FLAGS;
static {
final Map<String, Consumer<CommonStatsFlags>> flags = new HashMap<>();
for (final Flag flag : CommonStatsFlags.Flag.values()) {
flags.put(flag.getRestName(), f -> f.set(flag, true));
}
FLAGS = Collections.unmodifiableMap(flags);
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
String[] nodesIds = Strings.splitStringByCommaToArray(request.param("nodeId"));
Set<String> metrics = Strings.splitStringByCommaToSet(request.param("metric", "_all"));
NodesStatsRequest nodesStatsRequest = new NodesStatsRequest(nodesIds);
nodesStatsRequest.timeout(request.param("timeout"));
if (metrics.size() == 1 && metrics.contains("_all")) {
if (request.hasParam("index_metric")) {
throw new IllegalArgumentException(
String.format(
Locale.ROOT,
"request [%s] contains index metrics [%s] but all stats requested",
request.path(),
request.param("index_metric")));
}
nodesStatsRequest.all();
nodesStatsRequest.indices(CommonStatsFlags.ALL);
} else if (metrics.contains("_all")) {
throw new IllegalArgumentException(
String.format(Locale.ROOT,
"request [%s] contains _all and individual metrics [%s]",
request.path(),
request.param("metric")));
} else {
nodesStatsRequest.clear();
// use a sorted set so the unrecognized parameters appear in a reliable sorted order
final Set<String> invalidMetrics = new TreeSet<>();
for (final String metric : metrics) {
final Consumer<NodesStatsRequest> handler = METRICS.get(metric);
if (handler != null) {
handler.accept(nodesStatsRequest);
} else {
invalidMetrics.add(metric);
}
}
if (!invalidMetrics.isEmpty()) {
throw new IllegalArgumentException(unrecognized(request, invalidMetrics, METRICS.keySet(), "metric"));
}
// check for index specific metrics
if (metrics.contains("indices")) {
Set<String> indexMetrics = Strings.splitStringByCommaToSet(request.param("index_metric", "_all"));
if (indexMetrics.size() == 1 && indexMetrics.contains("_all")) {
nodesStatsRequest.indices(CommonStatsFlags.ALL);
} else {
CommonStatsFlags flags = new CommonStatsFlags();
flags.clear();
// use a sorted set so the unrecognized parameters appear in a reliable sorted order
final Set<String> invalidIndexMetrics = new TreeSet<>();
for (final String indexMetric : indexMetrics) {
final Consumer<CommonStatsFlags> handler = FLAGS.get(indexMetric);
if (handler != null) {
handler.accept(flags);
} else {
invalidIndexMetrics.add(indexMetric);
}
}
if (!invalidIndexMetrics.isEmpty()) {
throw new IllegalArgumentException(unrecognized(request, invalidIndexMetrics, FLAGS.keySet(), "index metric"));
}
nodesStatsRequest.indices(flags);
}
} else if (request.hasParam("index_metric")) {
throw new IllegalArgumentException(
String.format(
Locale.ROOT,
"request [%s] contains index metrics [%s] but indices stats not requested",
request.path(),
request.param("index_metric")));
}
}
if (nodesStatsRequest.indices().isSet(Flag.FieldData) && (request.hasParam("fields") || request.hasParam("fielddata_fields"))) {
nodesStatsRequest.indices().fieldDataFields(
request.paramAsStringArray("fielddata_fields", request.paramAsStringArray("fields", null)));
}
if (nodesStatsRequest.indices().isSet(Flag.Completion) && (request.hasParam("fields") || request.hasParam("completion_fields"))) {
nodesStatsRequest.indices().completionDataFields(
request.paramAsStringArray("completion_fields", request.paramAsStringArray("fields", null)));
}
if (nodesStatsRequest.indices().isSet(Flag.Search) && (request.hasParam("groups"))) {
nodesStatsRequest.indices().groups(request.paramAsStringArray("groups", null));
}
if (nodesStatsRequest.indices().isSet(Flag.Indexing) && (request.hasParam("types"))) {
nodesStatsRequest.indices().types(request.paramAsStringArray("types", null));
}
if (nodesStatsRequest.indices().isSet(Flag.Segments)) {
nodesStatsRequest.indices().includeSegmentFileSizes(request.paramAsBoolean("include_segment_file_sizes", false));
}
return channel -> client.admin().cluster().nodesStats(nodesStatsRequest, new NodesResponseRestListener<>(channel));
}
private final Set<String> RESPONSE_PARAMS = Collections.singleton("level");
@Override
protected Set<String> responseParams() {
return RESPONSE_PARAMS;
}
@Override
public boolean canTripCircuitBreaker() {
return false;
}
}