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The official Couchbase JVM Core IO Library
/*
* Copyright (c) 2015 Couchbase, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALING
* IN THE SOFTWARE.
*/
package com.couchbase.client.core.node;
import com.couchbase.client.core.service.Service;
import com.couchbase.client.core.state.AbstractStateZipper;
import com.couchbase.client.core.state.LifecycleState;
import java.util.Collection;
/**
* Calculates a merged state for all registered services.
*
* @author Michael Nitschinger
* @since 1.1.1
*/
public class ServiceStateZipper extends AbstractStateZipper {
private final LifecycleState initialState;
public ServiceStateZipper(LifecycleState initial) {
super(initial);
this.initialState = initial;
}
@Override
protected LifecycleState zipWith(Collection states) {
if (states.isEmpty()) {
return LifecycleState.DISCONNECTED;
}
int connected = 0;
int connecting = 0;
int disconnecting = 0;
int idle = 0;
for (LifecycleState serviceState : states) {
switch (serviceState) {
case CONNECTED:
connected++;
break;
case CONNECTING:
connecting++;
break;
case DISCONNECTING:
disconnecting++;
break;
case IDLE:
idle++;
break;
}
}
if (states.size() == idle) {
return LifecycleState.IDLE;
} else if (states.size() == (connected + idle)) {
return LifecycleState.CONNECTED;
} else if (connected > 0) {
return LifecycleState.DEGRADED;
} else if (connecting > 0) {
return LifecycleState.CONNECTING;
} else if (disconnecting > 0) {
return LifecycleState.DISCONNECTING;
} else {
return LifecycleState.DISCONNECTED;
}
}
}