1 files changed, 113 insertions, 0 deletions
diff --git a/src/main/java/org/elasticsearch/index/shard/ShardId.java b/src/main/java/org/elasticsearch/index/shard/ShardId.java
new file mode 100644
index 0000000..b7fe363
--- /dev/null
+++ b/src/main/java/org/elasticsearch/index/shard/ShardId.java
@@ -0,0 +1,113 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch 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.elasticsearch.index.shard;
+
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.io.stream.Streamable;
+import org.elasticsearch.index.Index;
+
+import java.io.IOException;
+import java.io.Serializable;
+
+/**
+ * Allows for shard level components to be injected with the shard id.
+ */
+public class ShardId implements Serializable, Streamable {
+
+    private Index index;
+
+    private int shardId;
+
+    private int hashCode;
+
+    private ShardId() {
+
+    }
+
+    public ShardId(String index, int shardId) {
+        this(new Index(index), shardId);
+    }
+
+    public ShardId(Index index, int shardId) {
+        this.index = index;
+        this.shardId = shardId;
+        this.hashCode = computeHashCode();
+    }
+
+    public Index index() {
+        return this.index;
+    }
+
+    public String getIndex() {
+        return index().name();
+    }
+
+    public int id() {
+        return this.shardId;
+    }
+
+    public int getId() {
+        return id();
+    }
+
+    @Override
+    public String toString() {
+        return "[" + index.name() + "][" + shardId + "]";
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null) return false;
+        ShardId shardId1 = (ShardId) o;
+        return shardId == shardId1.shardId && index.name().equals(shardId1.index.name());
+    }
+
+    @Override
+    public int hashCode() {
+        return hashCode;
+    }
+
+    private int computeHashCode() {
+        int result = index != null ? index.hashCode() : 0;
+        result = 31 * result + shardId;
+        return result;
+    }
+
+    public static ShardId readShardId(StreamInput in) throws IOException {
+        ShardId shardId = new ShardId();
+        shardId.readFrom(in);
+        return shardId;
+    }
+
+    @Override
+    public void readFrom(StreamInput in) throws IOException {
+        index = Index.readIndexName(in);
+        shardId = in.readVInt();
+        hashCode = computeHashCode();
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        index.writeTo(out);
+        out.writeVInt(shardId);
+    }
+}
+\ No newline at end of file