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Elasticsearch subproject :server
/*
* 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.
*/
/*
* 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.usage;
import org.elasticsearch.action.admin.cluster.node.usage.NodeUsage;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.rest.BaseRestHandler;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* A service to monitor usage of Elasticsearch features.
*/
public class UsageService {
private final List handlers;
private final long sinceTime;
public UsageService() {
this.handlers = new ArrayList<>();
this.sinceTime = System.currentTimeMillis();
}
/**
* Add a REST handler to this service.
*
* @param handler
* the {@link BaseRestHandler} to add to the usage service.
*/
public void addRestHandler(BaseRestHandler handler) {
handlers.add(handler);
}
/**
* Get the current usage statistics for this node.
*
* @param localNode
* the {@link DiscoveryNode} for this node
* @param restActions
* whether to include rest action usage in the returned
* statistics
* @return the {@link NodeUsage} representing the usage statistics for this
* node
*/
public NodeUsage getUsageStats(DiscoveryNode localNode, boolean restActions) {
Map restUsageMap;
if (restActions) {
restUsageMap = new HashMap<>();
handlers.forEach(handler -> {
long usageCount = handler.getUsageCount();
if (usageCount > 0) {
restUsageMap.put(handler.getName(), usageCount);
}
});
} else {
restUsageMap = null;
}
return new NodeUsage(localNode, System.currentTimeMillis(), sinceTime, restUsageMap);
}
}