| /* |
| * 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.beam.sdk.io.gcp.spanner; |
| |
| import com.google.cloud.spanner.Mutation; |
| import java.io.Serializable; |
| import java.util.Arrays; |
| import java.util.Iterator; |
| import java.util.List; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Objects; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableList; |
| |
| /** |
| * A bundle of mutations that must be submitted atomically. |
| * |
| * <p>One of the mutations is chosen to be "primary", and can be used to determine partitions. |
| */ |
| public final class MutationGroup implements Serializable, Iterable<Mutation> { |
| private final ImmutableList<Mutation> mutations; |
| |
| /** |
| * Creates a new group. |
| * |
| * @param primary a primary mutation. |
| * @param other other mutations, usually interleaved in parent. |
| * @return new mutation group. |
| */ |
| public static MutationGroup create(Mutation primary, Mutation... other) { |
| return create(primary, Arrays.asList(other)); |
| } |
| |
| public static MutationGroup create(Mutation primary, Iterable<Mutation> other) { |
| return new MutationGroup(ImmutableList.<Mutation>builder().add(primary).addAll(other).build()); |
| } |
| |
| @Override |
| public Iterator<Mutation> iterator() { |
| return mutations.iterator(); |
| } |
| |
| private MutationGroup(ImmutableList<Mutation> mutations) { |
| this.mutations = mutations; |
| } |
| |
| public Mutation primary() { |
| return mutations.get(0); |
| } |
| |
| public List<Mutation> attached() { |
| return mutations.subList(1, mutations.size()); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| MutationGroup mutations1 = (MutationGroup) o; |
| return Objects.equal(mutations, mutations1.mutations); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(mutations); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder("MutationGroup("); |
| sb.append(mutations); |
| sb.append(")"); |
| return sb.toString(); |
| } |
| } |