From e767ef09c4ef125f0dc77dc13dfcca6d534a25d3 Mon Sep 17 00:00:00 2001
From: Hou Zhizhen <houzhizhen@baidu.com>
Date: Fri, 19 Mar 2021 14:38:51 +0800
Subject: [PATCH 1/2] add ComputerOutput interface

---
 .../computer/core/output/ComputerOutput.java  | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java

diff --git a/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java b/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java
new file mode 100644
index 000000000..934133e72
--- /dev/null
+++ b/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2017 HugeGraph Authors
+ *
+ * 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 com.baidu.hugegraph.computer.core.output;
+
+import com.baidu.hugegraph.computer.core.config.Config;
+import com.baidu.hugegraph.computer.core.graph.vertex.Vertex;
+
+/**
+ * Computer output is used to output computer results. There is a output object
+ * for every partition.
+ */
+public interface ComputerOutput {
+
+    /**
+     * Initialize the output. Create connection to target output system.
+     */
+    void init(Config config, int partition);
+
+    /**
+     * For each vertex in partition, this method is called regardless
+     * vertex's status.
+     */
+    void write(Vertex vertex);
+
+    /**
+     * Close the connection to target output system. Commit if target output
+     * required.
+     */
+    void close();
+}

From 49d1b97fd0b7179b2d6dd8e9077b1ea7dcc1dd1a Mon Sep 17 00:00:00 2001
From: Hou Zhizhen <houzhizhen@baidu.com>
Date: Mon, 22 Mar 2021 12:06:03 +0800
Subject: [PATCH 2/2] tiny improve

---
 .../baidu/hugegraph/computer/core/output/ComputerOutput.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java b/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java
index 934133e72..514d93c42 100644
--- a/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java
+++ b/computer-core/src/main/java/com/baidu/hugegraph/computer/core/output/ComputerOutput.java
@@ -23,7 +23,7 @@
 import com.baidu.hugegraph.computer.core.graph.vertex.Vertex;
 
 /**
- * Computer output is used to output computer results. There is a output object
+ * Computer output is used to output computer results. There is an output object
  * for every partition.
  */
 public interface ComputerOutput {