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java-design-patterns/circuit-breaker/src/main/java/com/iluwatar/circuitbreaker/MonitoringService.java

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/**
* The MIT License
* Copyright (c) 2014 Ilkka Seppälä
*
* 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 DEALINGS IN
* THE SOFTWARE.
*/
package com.iluwatar.circuitbreaker;
/**
* The service class which makes local and remote calls
* Uses {@link CircuitBreaker} object to ensure remote calls don't use up resources
*/
public class MonitoringService {
//Assumption: Local service won't fail, no need to wrap it in a circuit breaker logic
public String localResourceResponse() {
return "Local Service is working";
}
/**
* Try to get result from remote server
* @param circuitBreaker The circuitBreaker object with all parameters
* @param serverStartTime Time at which actual server was started which makes calls to this service
* @return result from the remote response or exception raised by it.
*/
public String remoteResourceResponse(CircuitBreaker circuitBreaker, long serverStartTime) {
try {
return circuitBreaker.call("delayedService", serverStartTime);
} catch (Exception e) {
return e.getMessage();
}
}
}