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https://issues.apache.org/jira/browse/SCB-324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16409022#comment-16409022
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ASF GitHub Bot commented on SCB-324:
------------------------------------
maheshrajus commented on a change in pull request #615: [SCB-324]
Fault-Injection handler implementation
URL:
https://github.com/apache/incubator-servicecomb-java-chassis/pull/615#discussion_r176305226
##########
File path:
handlers/handler-fault-injection/src/main/java/org/apache/servicecomb/faultinjection/FaultInjectionHandler.java
##########
@@ -0,0 +1,86 @@
+/*
+ * 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.ArrayList;
+import java.util.List;
+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.exception.InvocationException;
+
+import io.vertx.core.Context;
+import io.vertx.core.Vertx;
+
+/**
+ * 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 List<Fault> faultInjectionFeatureList = new ArrayList<>();
+
+ //added only for unit testing
+ public void setFaultFeature(List<Fault> faultFeature) {
+ faultInjectionFeatureList = faultFeature;
+ }
+
+ public static List<Fault> getFaultFeature() {
+ return faultInjectionFeatureList;
+ }
+
+ @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();
+ AtomicLong reqCount = FaultInjectionUtil.getOperMetTotalReq(key);
+ long reqCountCurrent = reqCount.get();
Review comment:
done
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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-m2
>
>
> 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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