| /* |
| * 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.cassandra; |
| |
| import java.nio.ByteBuffer; |
| |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.db.*; |
| import org.apache.cassandra.db.partitions.*; |
| import org.apache.cassandra.utils.FBUtilities; |
| import org.apache.cassandra.service.StorageService; |
| |
| |
| /** |
| * Convenience object to create updates to a single partition. |
| * |
| * This is not unlike RowUpdateBuilder except that it allows to create update to multiple rows more easily. |
| * It is also aimed at unit tests so favor convenience over efficiency. |
| */ |
| public class UpdateBuilder |
| { |
| private final PartitionUpdate update; |
| private RowUpdateBuilder currentRow; |
| private long timestamp = FBUtilities.timestampMicros(); |
| |
| private UpdateBuilder(CFMetaData metadata, DecoratedKey partitionKey) |
| { |
| this.update = new PartitionUpdate(metadata, partitionKey, metadata.partitionColumns(), 4); |
| } |
| |
| public static UpdateBuilder create(CFMetaData metadata, Object... partitionKey) |
| { |
| return new UpdateBuilder(metadata, makeKey(metadata, partitionKey)); |
| } |
| |
| public UpdateBuilder withTimestamp(long timestamp) |
| { |
| this.timestamp = timestamp; |
| return this; |
| } |
| |
| public UpdateBuilder newRow(Object... clustering) |
| { |
| maybeBuildCurrentRow(); |
| currentRow = new RowUpdateBuilder(update, timestamp, 0); |
| if (clustering.length > 0) |
| currentRow.clustering(clustering); |
| return this; |
| } |
| |
| public UpdateBuilder add(String column, Object value) |
| { |
| assert currentRow != null; |
| currentRow.add(column, value); |
| return this; |
| } |
| |
| public PartitionUpdate build() |
| { |
| maybeBuildCurrentRow(); |
| return update; |
| } |
| |
| public IMutation makeMutation() |
| { |
| Mutation m = new Mutation(build()); |
| return update.metadata().isCounter() |
| ? new CounterMutation(m, ConsistencyLevel.ONE) |
| : m; |
| } |
| |
| public void apply() |
| { |
| Mutation m = new Mutation(build()); |
| if (update.metadata().isCounter()) |
| new CounterMutation(m, ConsistencyLevel.ONE).apply(); |
| else |
| m.apply(); |
| } |
| |
| public void applyUnsafe() |
| { |
| assert !update.metadata().isCounter() : "Counters have currently no applyUnsafe() option"; |
| new Mutation(build()).applyUnsafe(); |
| } |
| |
| private void maybeBuildCurrentRow() |
| { |
| if (currentRow != null) |
| { |
| currentRow.build(); |
| currentRow = null; |
| } |
| } |
| |
| private static DecoratedKey makeKey(CFMetaData metadata, Object[] partitionKey) |
| { |
| if (partitionKey.length == 1 && partitionKey[0] instanceof DecoratedKey) |
| return (DecoratedKey)partitionKey[0]; |
| |
| ByteBuffer key = CFMetaData.serializePartitionKey(metadata.getKeyValidatorAsClusteringComparator().make(partitionKey)); |
| return metadata.decorateKey(key); |
| } |
| } |