1 files changed, 122 insertions, 0 deletions
diff --git a/sql/hive-thriftserver/src/main/java/org/apache/hive/service/Service.java b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/Service.java
new file mode 100644
index 0000000000..2111837cac
--- /dev/null
+++ b/sql/hive-thriftserver/src/main/java/org/apache/hive/service/Service.java
@@ -0,0 +1,122 @@
+/**
+ * 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;
+
+/**
+ * Service.
+ *
+ */
+public interface Service {
+
+  /**
+   * Service states
+   */
+  public enum STATE {
+    /** Constructed but not initialized */
+    NOTINITED,
+
+    /** Initialized but not started or stopped */
+    INITED,
+
+    /** started and not stopped */
+    STARTED,
+
+    /** stopped. No further state transitions are permitted */
+    STOPPED
+  }
+
+  /**
+   * Initialize the service.
+   *
+   * The transition must be from {@link STATE#NOTINITED} to {@link STATE#INITED} unless the
+   * operation failed and an exception was raised.
+   *
+   * @param config
+   *          the configuration of the service
+   */
+  void init(HiveConf conf);
+
+
+  /**
+   * Start the service.
+   *
+   * The transition should be from {@link STATE#INITED} to {@link STATE#STARTED} unless the
+   * operation failed and an exception was raised.
+   */
+  void start();
+
+  /**
+   * Stop the service.
+   *
+   * This operation must be designed to complete regardless of the initial state
+   * of the service, including the state of all its internal fields.
+   */
+  void stop();
+
+  /**
+   * Register an instance of the service state change events.
+   *
+   * @param listener
+   *          a new listener
+   */
+  void register(ServiceStateChangeListener listener);
+
+  /**
+   * Unregister a previously instance of the service state change events.
+   *
+   * @param listener
+   *          the listener to unregister.
+   */
+  void unregister(ServiceStateChangeListener listener);
+
+  /**
+   * Get the name of this service.
+   *
+   * @return the service name
+   */
+  String getName();
+
+  /**
+   * Get the configuration of this service.
+   * This is normally not a clone and may be manipulated, though there are no
+   * guarantees as to what the consequences of such actions may be
+   *
+   * @return the current configuration, unless a specific implementation chooses
+   *         otherwise.
+   */
+  HiveConf getHiveConf();
+
+  /**
+   * Get the current service state
+   *
+   * @return the state of the service
+   */
+  STATE getServiceState();
+
+  /**
+   * Get the service start time
+   *
+   * @return the start time of the service. This will be zero if the service
+   *         has not yet been started.
+   */
+  long getStartTime();
+
+}