| /* |
| * 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.rya.mongodb.batch; |
| |
| import org.apache.hadoop.conf.Configuration; |
| |
| /** |
| * Constants and utility methods related to batch writing statements in a MongoDB |
| * Rya repository. |
| */ |
| public final class MongoDbBatchWriterUtils { |
| /** |
| * Config tag used to specify the number of statements to batch write at a |
| * time. |
| */ |
| public static final String BATCH_SIZE_TAG = "rya.mongodb.dao.batchwriter.size"; |
| |
| /** |
| * Config tag used to specify the time to wait in milliseconds to flush all |
| * statements out that are queued for insertion if the queue has not filled |
| * up to its capacity. |
| */ |
| public static final String BATCH_FLUSH_TIME_MS_TAG = "rya.mongodb.dao.batchwriter.flushtime"; |
| |
| /** |
| * Private constructor to prevent instantiation. |
| */ |
| private MongoDbBatchWriterUtils() { |
| } |
| |
| /** |
| * The number of statements to batch write at a time. |
| * @param conf the {@link Configuration} to check. |
| * @return the configured value or the default value. |
| */ |
| public static int getConfigBatchSize(final Configuration conf) { |
| return conf.getInt(BATCH_SIZE_TAG, MongoDbBatchWriterConfig.DEFAULT_BATCH_SIZE); |
| } |
| |
| /** |
| * The time to wait in milliseconds to flush all statements out that are |
| * queued for insertion if the queue has not filled up to its capacity. |
| * @param conf the {@link Configuration} to check. |
| * @return the configured value or the default value. |
| */ |
| public static long getConfigBatchFlushTimeMs(final Configuration conf) { |
| return conf.getLong(BATCH_FLUSH_TIME_MS_TAG, MongoDbBatchWriterConfig.DEFAULT_BATCH_FLUSH_TIME_MS); |
| } |
| |
| /** |
| * Reads the specified configed to create and initialize a |
| * {@link MongoDbBatchWriterConfig}. If no values are found then the default |
| * values are used. |
| * @param conf the {@link Configuration} to check. |
| * @return the {@link MongoDbBatchWriterConfig} populated with configured |
| * values for the specified {@code conf}. |
| */ |
| public static MongoDbBatchWriterConfig getMongoDbBatchWriterConfig(final Configuration conf) { |
| final int batchSize = getConfigBatchSize(conf); |
| final long batchFlushTimeMs = getConfigBatchFlushTimeMs(conf); |
| final MongoDbBatchWriterConfig mongoDbBatchWriterConfig = new MongoDbBatchWriterConfig(); |
| mongoDbBatchWriterConfig.setBatchSize(batchSize); |
| mongoDbBatchWriterConfig.setBatchFlushTimeMs(batchFlushTimeMs); |
| return mongoDbBatchWriterConfig; |
| } |
| } |