| /* |
| * 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.indexing.external.accumulo; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import org.apache.accumulo.core.client.Connector; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.rya.indexing.pcj.storage.accumulo.AccumuloPcjStorage; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.base.Supplier; |
| |
| import org.apache.rya.indexing.external.PrecomputedJoinIndexerConfig; |
| import org.apache.rya.indexing.external.PrecomputedJoinIndexerConfig.PrecomputedJoinStorageType; |
| |
| /** |
| * Creates instances of {@link AccumuloPcjStorage} using the values found in a {@link Configuration}. |
| */ |
| public class AccumuloPcjStorageSupplier implements Supplier<AccumuloPcjStorage> { |
| |
| private final Supplier<Configuration> configSupplier; |
| private final Supplier<Connector> accumuloSupplier; |
| |
| /** |
| * Constructs an instance of {@link AccumuloPcjStorageSupplier}. |
| * |
| * @param configSupplier - Configures the {@link AccumuloPcjStorage} that is |
| * supplied by this class. (not null) |
| * @param accumuloSupplier - Provides the {@link Connector} that is used by |
| * the {@link AccumuloPcjStorage} that is supplied by this class. (not null) |
| */ |
| public AccumuloPcjStorageSupplier( |
| final Supplier<Configuration> configSupplier, |
| final Supplier<Connector> accumuloSupplier) { |
| this.configSupplier = checkNotNull(configSupplier); |
| this.accumuloSupplier = checkNotNull(accumuloSupplier); |
| } |
| |
| @Override |
| public AccumuloPcjStorage get() { |
| // Ensure a configuration has been set. |
| final Configuration config = configSupplier.get(); |
| checkNotNull(config, "Could not create a AccumuloPcjStorage because the application's configuration has not been provided yet."); |
| |
| // Ensure the correct storage type has been set. |
| final PrecomputedJoinIndexerConfig indexerConfig = new PrecomputedJoinIndexerConfig(config); |
| |
| final Optional<PrecomputedJoinStorageType> storageType = indexerConfig.getPcjStorageType(); |
| checkArgument(storageType.isPresent() && (storageType.get() == PrecomputedJoinStorageType.ACCUMULO), |
| "This supplier requires the '" + PrecomputedJoinIndexerConfig.PCJ_STORAGE_TYPE + |
| "' value be set to '" + PrecomputedJoinStorageType.ACCUMULO + "'."); |
| |
| // Ensure the Accumulo connector has been set. |
| final Connector accumuloConn = accumuloSupplier.get(); |
| checkNotNull(accumuloConn, "The Accumulo Connector must be set before initializing the AccumuloPcjStorage."); |
| |
| final String ryaInstanceName = new AccumuloPcjStorageConfig(config).getRyaInstanceName(); |
| return new AccumuloPcjStorage(accumuloConn, ryaInstanceName); |
| } |
| } |