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/**
 * 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
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package com.datatorrent.lib.db;

import java.io.IOException;

import com.datatorrent.api.Context.OperatorContext;
import com.datatorrent.api.DefaultOutputPort;
import com.datatorrent.api.InputOperator;

/**
 * This is the base implementation of an input adapter which reads from a store. 
 * A concrete operator should be created from this skeleton implementation.
 * 

* @displayName Abstract Store Input * @category Input * * @param The tuple type * @param The store type * @since 0.9.3 */ @org.apache.hadoop.classification.InterfaceStability.Evolving public abstract class AbstractStoreInputOperator implements InputOperator { /** * The output port on which tuples read form a store are emitted. */ public final transient DefaultOutputPort outputPort = new DefaultOutputPort(); protected S store; /** * Gets the store. * * @return the store */ public S getStore() { return store; } /** * Sets the store. * * @param store */ public void setStore(S store) { this.store = store; } @Override public void beginWindow(long l) { } @Override public void endWindow() { } @Override public void setup(OperatorContext t1) { try { store.connect(); } catch (IOException ex) { throw new RuntimeException(ex); } } @Override public void teardown() { try { store.disconnect(); } catch (IOException ex) { // ignore } } }




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