com.gemstone.gemfire.cache.server.internal.ConnectionCountProbe Maven / Gradle / Ivy
/*
* Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
*
* Licensed 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.cache.server.internal;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.util.Properties;
import com.gemstone.gemfire.DataSerializable;
import com.gemstone.gemfire.cache.server.ServerLoad;
import com.gemstone.gemfire.cache.server.ServerLoadProbeAdapter;
import com.gemstone.gemfire.cache.server.ServerMetrics;
import com.gemstone.gemfire.internal.cache.xmlcache.Declarable2;
/**
* A load probe which returns load as a function of the
* number of connections to the bridge server.
*
* The Load object returned by this probe reports the
* connection load as the number of connections to this
* server divided by the max connections for this server. This
* means that servers with a lower max connections will receive
* fewer connections than servers with a higher max connections.
* The load therefore is a number between 0 and 1, where 0 means there
* are are no connections, and 1 means the server at max connections.
*
* The queue load is reported simply as the number of queues
* hosted by this bridge server.
*
*
* @author dsmith
* @since 5.7
*/
public class ConnectionCountProbe extends ServerLoadProbeAdapter implements
Declarable2, DataSerializable {
private static final long serialVersionUID = -5072528455996471323L;
/**
* Get a loads object representing the number of connections
* to this bridge server
*/
public ServerLoad getLoad(ServerMetrics metrics) {
float load = metrics.getConnectionCount() / (float) metrics.getMaxConnections();
int queueLoad = metrics.getSubscriptionConnectionCount();
float loadPerConnection = 1 / (float) metrics.getMaxConnections();
return new ServerLoad(load, loadPerConnection, queueLoad, 1);
}
public Properties getConfig() {
return new Properties();
}
public void init(Properties props) {
}
@Override
public boolean equals(Object other) {
return(other != null && this.getClass().equals(other.getClass()));
}
@Override
public int hashCode() {
// since we have no state defer to super. Added this to keep findbugs happy.
return super.hashCode();
}
@Override
public String toString() {
return "ConnectionCountProbe";
}
public void fromData(DataInput in) throws IOException, ClassNotFoundException {
//do nothing, we have no state
}
public void toData(DataOutput out) throws IOException {
//do nothing, we have no state
}
}