Fix for issue #413: Circuit Breaker Pattern (#986)

* Fix Issue #413: Circuit-Breaker Pattern

* Fix Image Links

* Remove Javadoc plugin to ensure correct build

* Implementing code review feedback

* Sync README with actual code

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

@@ -0,0 +1,50 @@
+/**
+ * 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();
+    }
+  }
+}