| /* |
| * 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.contrib.couchdb; |
| |
| import com.datatorrent.lib.db.AbstractStoreOutputOperator; |
| |
| /** |
| * Generic base output adaptor which saves tuples in the CouchDb. Subclasses should provide implementation for getting Document Id. <br/> |
| * <p> |
| * An {@link AbstractStoreOutputOperator} saving tuples in the CouchDb. |
| * Sub-classes provide the implementation of parsing document id from the tuple. |
| * @displayName Abstract CouchDB Output |
| * @category Database |
| * @tags output operator |
| * @param <T> type of tuple </T> |
| * @since 0.3.5 |
| */ |
| public abstract class AbstractCouchDBOutputOperator<T> extends AbstractStoreOutputOperator<T, CouchDbStore> |
| { |
| |
| AbstractCouchDBOutputOperator() |
| { |
| super(); |
| } |
| |
| @Override |
| public void processTuple(T tuple) |
| { |
| store.upsertDocument(getDocumentId(tuple), tuple); |
| } |
| |
| /** |
| * Get document id from the tuple. |
| * |
| * @param tuple tuple to be saved. |
| * @return document id. |
| */ |
| public abstract String getDocumentId(T tuple); |
| } |