| /* |
| * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved. |
| * |
| * Licensed 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 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. |
| * <p></p> |
| * @displayName Abstract Store Input |
| * @category Store |
| * @tags input operator |
| * |
| * @param <T> The tuple type |
| * @param <S> The store type |
| * @since 0.9.3 |
| */ |
| public abstract class AbstractStoreInputOperator<T, S extends Connectable> implements InputOperator |
| { |
| /** |
| * The output port on which tuples read form a store are emitted. |
| */ |
| final public transient DefaultOutputPort<T> outputPort = new DefaultOutputPort<T>(); |
| 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 |
| } |
| } |
| } |