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https://issues.apache.org/jira/browse/SCB-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16352093#comment-16352093
 ] 

ASF GitHub Bot commented on SCB-324:
------------------------------------

liubao68 commented on a change in pull request #543: [SCB-324] Fault-Injection 
handler implementation
URL: 
https://github.com/apache/incubator-servicecomb-java-chassis/pull/543#discussion_r165896361
 
 

 ##########
 File path: 
handlers/handler-fault-injection/src/main/java/org/apache/servicecomb/faultinjection/FaultInjectionHandler.java
 ##########
 @@ -0,0 +1,216 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF 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.apache.servicecomb.faultinjection;
+
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.apache.servicecomb.core.Handler;
+import org.apache.servicecomb.core.Invocation;
+import org.apache.servicecomb.swagger.invocation.AsyncResponse;
+import org.apache.servicecomb.swagger.invocation.context.HttpStatus;
+import org.apache.servicecomb.swagger.invocation.exception.CommonExceptionData;
+import org.apache.servicecomb.swagger.invocation.exception.InvocationException;
+import static org.apache.servicecomb.faultinjection.FaultInjectionConst.*;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Fault injection handler which injects the delay/abort for requests based on
+ * the percentage configured in service file.
+ *
+ */
+public class FaultInjectionHandler implements Handler {
+  private static final Logger LOGGER = 
LoggerFactory.getLogger(FaultInjectionHandler.class);
+
+  @Override
+  public void handle(Invocation invocation, AsyncResponse asyncResp) throws 
Exception {
+    // prepare the key and lookup for request count.
+    String key = invocation.getTransport().getName() + 
invocation.getMicroserviceQualifiedName();
 
 Review comment:
   transport may be empty

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> Chassis must support network failure simulation, so that I can developers can 
> enhance the robustness of the app
> ---------------------------------------------------------------------------------------------------------------
>
>                 Key: SCB-324
>                 URL: https://issues.apache.org/jira/browse/SCB-324
>             Project: Apache ServiceComb
>          Issue Type: Task
>          Components: Java-Chassis
>            Reporter: sukesh
>            Assignee: sukesh
>            Priority: Minor
>             Fix For: java-chassis-1.0.0-m1
>
>
> Add new handler for fault injection.
> 1) If handler 'fault-injection' is added in application property 
> file(microservice.yaml) then fault-injection handler should include in 
> handler chain.
> 2) When handler is called read the configuration and listen the configuration 
> event related to fault inject. The sample configuration file is in next slide.
> 3) The configuration mainly consist
>     -delay
>     -abort
>  *delay:*can set the delay for requests based on percentage configured. The 
> unit is ms. The delay percentage default value is 100%
>  *abort*: Abort the requests based on percentage configured. For rest 
> transport protocol error code can be configurable(500, 421) and highway 
> protocol does not support for error return. The abort percentage default 
> value is 100%
> 4) This features currently supports at consumer side.



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