Get API: Allow to provide a parent value which automatically set the routing value, closes #1961.

src/main/java/org/elasticsearch/action/delete/DeleteRequestBuilder.java

@@ -64,6 +64,15 @@ public class DeleteRequestBuilder extends BaseRequestBuilder<DeleteRequest, Dele
         return this;
     }
 
+    /**
+     * Sets the parent id of this document. Will simply set the routing to this value, as it is only
+     * used for routing with delete requests.
+     */
+    public DeleteRequestBuilder setParent(String parent) {
+        request.parent(parent);
+        return this;
+    }
+
     /**
      * Controls the shard routing of the delete request. Using this value to hash the shard
      * and not the id.

src/main/java/org/elasticsearch/action/get/GetRequest.java

@@ -120,6 +120,17 @@ public class GetRequest extends SingleShardOperationRequest {
         return this;
     }
 
+    /**
+     * Sets the parent id of this document. Will simply set the routing to this value, as it is only
+     * used for routing with delete requests.
+     */
+    public GetRequest parent(String parent) {
+        if (routing == null) {
+            routing = parent;
+        }
+        return this;
+    }
+
     /**
      * Controls the shard routing of the request. Using this value to hash the shard
      * and not the id.

src/main/java/org/elasticsearch/action/get/GetRequestBuilder.java

@@ -62,6 +62,15 @@ public class GetRequestBuilder extends BaseRequestBuilder<GetRequest, GetRespons
         return this;
     }
 
+    /**
+     * Sets the parent id of this document. Will simply set the routing to this value, as it is only
+     * used for routing with delete requests.
+     */
+    public GetRequestBuilder setParent(String parent) {
+        request.parent(parent);
+        return this;
+    }
+
     /**
      * Controls the shard routing of the request. Using this value to hash the shard
      * and not the id.

src/main/java/org/elasticsearch/rest/action/get/RestGetAction.java

@@ -55,6 +55,7 @@ public class RestGetAction extends BaseRestHandler {
         // if we have a local operation, execute it on a thread since we don't spawn
         getRequest.operationThreaded(true);
         getRequest.refresh(request.paramAsBoolean("refresh", getRequest.refresh()));
+        getRequest.parent(request.param("parent"));
         getRequest.routing(request.param("routing"));
         getRequest.preference(request.param("preference"));
         getRequest.realtime(request.paramAsBooleanOptional("realtime", null));