1 files changed, 121 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/BreakableService.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/BreakableService.java
new file mode 100644
index 0000000000..9c44beb2fb
--- /dev/null
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/BreakableService.java
@@ -0,0 +1,121 @@
+/**
+ * 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.hive.service;
+
+import org.apache.hadoop.hive.conf.HiveConf;
+import org.apache.hive.service.Service.STATE;
+
+/**
+ * This is a service that can be configured to break on any of the lifecycle
+ * events, so test the failure handling of other parts of the service
+ * infrastructure.
+ *
+ * It retains a counter to the number of times each entry point is called -
+ * these counters are incremented before the exceptions are raised and
+ * before the superclass state methods are invoked.
+ *
+ */
+public class BreakableService extends AbstractService {
+  private boolean failOnInit;
+  private boolean failOnStart;
+  private boolean failOnStop;
+  private final int[] counts = new int[4];
+
+  public BreakableService() {
+    this(false, false, false);
+  }
+
+  public BreakableService(boolean failOnInit,
+                          boolean failOnStart,
+                          boolean failOnStop) {
+    super("BreakableService");
+    this.failOnInit = failOnInit;
+    this.failOnStart = failOnStart;
+    this.failOnStop = failOnStop;
+    inc(STATE.NOTINITED);
+  }
+
+  private int convert(STATE state) {
+    switch (state) {
+      case NOTINITED: return 0;
+      case INITED:    return 1;
+      case STARTED:   return 2;
+      case STOPPED:   return 3;
+      default:        return 0;
+    }
+  }
+
+  private void inc(STATE state) {
+    int index = convert(state);
+    counts[index] ++;
+  }
+
+  public int getCount(STATE state) {
+    return counts[convert(state)];
+  }
+
+  private void maybeFail(boolean fail, String action) {
+    if (fail) {
+      throw new BrokenLifecycleEvent(action);
+    }
+  }
+
+  @Override
+  public void init(HiveConf conf) {
+    inc(STATE.INITED);
+    maybeFail(failOnInit, "init");
+    super.init(conf);
+  }
+
+  @Override
+  public void start() {
+    inc(STATE.STARTED);
+    maybeFail(failOnStart, "start");
+    super.start();
+  }
+
+  @Override
+  public void stop() {
+    inc(STATE.STOPPED);
+    maybeFail(failOnStop, "stop");
+    super.stop();
+  }
+
+  public void setFailOnInit(boolean failOnInit) {
+    this.failOnInit = failOnInit;
+  }
+
+  public void setFailOnStart(boolean failOnStart) {
+    this.failOnStart = failOnStart;
+  }
+
+  public void setFailOnStop(boolean failOnStop) {
+    this.failOnStop = failOnStop;
+  }
+
+  /**
+   * The exception explicitly raised on a failure
+   */
+  public static class BrokenLifecycleEvent extends RuntimeException {
+    BrokenLifecycleEvent(String action) {
+      super("Lifecycle Failure during " + action);
+    }
+  }
+
+}