update compatibility and branch

docs-2.0/14.client/3.nebula-cpp-client.md

@@ -24,7 +24,7 @@
   - (Recommended) To install a specific version of Nebula CPP, use the Git option `--branch` to specify the branch. For example, to install v{{ cpp.release }}, run the following command:
 
     ```bash
-    $ git clone --branch v{{ cpp.release }} https://github.com/vesoft-inc/nebula-cpp.git
+    $ git clone --branch {{cpp.branch}} https://github.com/vesoft-inc/nebula-cpp.git
     ```
 
   - To install the daily development version, run the following command to download the source code from the `master` branch:
@@ -103,23 +103,4 @@ Compile the CPP file to an executable file, then you can use it. The following s
 
 ### Core of the example code
 
-This sub-section shows the core of the example code. For all the code, see [SessionExample](https://github.com/vesoft-inc/nebula-cpp/blob/master/examples/SessionExample.cpp).
-
-```C++
-nebula::init(&argc, &argv);
-auto address = "192.168.xx.1:9669";
-nebula::ConnectionPool pool;
-pool.init({address}, nebula::Config{});
-auto session = pool.getSession("root", "nebula");
-
-auto result = session.execute("SHOW HOSTS");
-std::cout << *result.data;
-
-std::atomic_bool complete{false};
-session.asyncExecute("SHOW HOSTS", [&complete](nebula::ExecutionResponse&& cbResult) {
-    std::cout << *cbResult.data;
-    complete.store(true);
-});
-session.release();
-```
-
+This sub-section shows the core of the example code. For all the code, see [SessionExample](https://github.com/vesoft-inc/nebula-cpp/blob/{{cpp.branch}}/examples/SessionExample.cpp).

docs-2.0/14.client/4.nebula-java-client.md

@@ -20,7 +20,7 @@ You have installed Java 8.0 or later versions.
 - (Recommended) To install a specific version of Nebula Java, use the Git option `--branch` to specify the branch. For example, to install v{{ java.release }}, run the following command:
 
   ```bash
-  $ git clone --branch v{{ java.release }} https://github.com/vesoft-inc/nebula-java.git
+  $ git clone --branch {{java.branch}} https://github.com/vesoft-inc/nebula-java.git
   ```
 
 - To install the daily development version, run the following command to download the source code from the `master` branch:
@@ -39,13 +39,13 @@ When importing a Maven project with tools such as IDEA, set the following depend
 
 !!! note
 
-    `2.0.0-SNAPSHOT` indicates the daily development version that may have unknown issues. We recommend that you replace `2.0.0-SNAPSHOT` with a released version number to use a table version.
+    `3.0.0-SNAPSHOT` indicates the daily development version that may have unknown issues. We recommend that you replace `3.0.0-SNAPSHOT` with a released version number to use a table version.
 
 ```bash
 <dependency>
   <groupId>com.vesoft</groupId>
   <artifactId>client</artifactId>
-  <version>2.0.0-SNAPSHOT</version>
+  <version>3.0.0-SNAPSHOT</version>
 </dependency>
 ```
 
@@ -64,50 +64,5 @@ If there is no Maven to manage the project, manually download the [JAR file](htt
 
 ### Core of the example code
 
-This sub-section shows the core of the example code. For all the code, see [GraphClientExample](https://github.com/vesoft-inc/nebula-java/blob/master/examples/src/main/java/com/vesoft/nebula/examples/GraphClientExample.java).
-
-```java
-NebulaPool pool = new NebulaPool();
-Session session = null;
-try {
-    NebulaPoolConfig nebulaPoolConfig = new NebulaPoolConfig();
-    nebulaPoolConfig.setMaxConnSize(100);
-    List<HostAddress> addresses = Arrays.asList(new HostAddress("192.168.xx.1", 9669),
-            new HostAddress("192.168.xx.2", 9670));
-    pool.init(addresses, nebulaPoolConfig);
-    session = pool.getSession("root", "nebula", false);
-
-    //create space
-    String space = "test";
-    String createSpace = "CREATE SPACE IF NOT EXISTS " + space + " (partition_num=15, replica_factor=1, vid_type=fixed_string(30)); ";
-    ResultSet resp = session.execute(createSpace);
-
-
-    //create schema
-    String createSchema = "USE " + space + "; CREATE TAG IF NOT EXISTS person(name string, age int);"
-            + "CREATE EDGE IF NOT EXISTS like(likeness double)";
-    ResultSet resp = session.execute(createSchema);
-
-    //insert vertex
-    String insertVertexes = "INSERT VERTEX person(name, age) VALUES " + "'Bob':('Bob', 10), "
-            + "'Lily':('Lily', 9), " + "'Tom':('Tom', 10), " + "'Jerry':('Jerry', 13), "
-            + "'John':('John', 11);";
-    ResultSet resp = session.execute(insertVertexes);
-
-    // inert edge
-    String insertEdges = "INSERT EDGE like(likeness) VALUES " + "'Bob'->'Lily':(80.0), "
-            + "'Bob'->'Tom':(70.0), " + "'Lily'->'Jerry':(84.0), " + "'Tom'->'Jerry':(68.3), "
-            + "'Bob'->'John':(97.2);";
-    ResultSet resp = session.execute(insertEdges);
-
-    // query
-    String query = "GO FROM \"Bob\" OVER like " + "YIELD properties($$).name, properties($$).age, properties(edge).likeness";
-    ResultSet resp = session.execute(query);
-    printResult(resp);
-}finally {
-  if (session != null) {
-      session.release();
-  }
-  pool.close();
-}
-```
+This sub-section shows the core of the example code. For all the code, see [GraphClientExample](https://github.com/vesoft-inc/nebula-java/blob/{{java.branch}}/examples/src/main/java/com/vesoft/nebula/examples/GraphClientExample.java).
+

docs-2.0/14.client/5.nebula-python-client.md

@@ -20,7 +20,7 @@ You have installed Python 3.6 or later versions.
 ### Install Nebula Python with pip
 
 ```bash
-$ pip install nebula2-python==<version>
+$ pip install nebula3-python==<version>
 ```
 
 ### Install Nebula Python from the source code
@@ -30,7 +30,7 @@ $ pip install nebula2-python==<version>
   - (Recommended) To install a specific version of Nebula Python, use the Git option `--branch` to specify the branch. For example, to install v{{ python.release }}, run the following command:
 
     ```bash
-    $ git clone --branch v{{ python.release }} https://github.com/vesoft-inc/nebula-python.git
+    $ git clone --branch {{python.branch}} https://github.com/vesoft-inc/nebula-python.git
     ```
 
   - To install the daily development version, run the following command to download the source code from the `master` branch:
@@ -53,66 +53,4 @@ $ pip install nebula2-python==<version>
 
 ## Core of the example code
 
-This section shows the core of the example code. For all the code, see [Example](https://github.com/vesoft-inc/nebula-python/tree/master/example).
-
-### Connect to the Graph Service
-
-```python
-# Customize configurations.
-config = Config()
-config.max_connection_pool_size = 10
-# Initialize the connection pool.
-connection_pool = ConnectionPool()
-# Returns true if the server is healthy, false otherwise.
-ok = connection_pool.init([('192.168.xx.1', 9669)], config)
-
-# Method 1: Manually specify when to release the session.
-# Get the session from the connection pool.
-session = connection_pool.get_session('root', 'nebula')
-
-# Select a graph space.
-session.execute('USE basketballplayer')
-
-# Run the SHOW TAGS statement.
-result = session.execute('SHOW TAGS')
-print(result)
-
-# Release the session.
-session.release()
-
-# Method 2: Use session_context to automatically release the session.
-with connection_pool.session_context('root', 'nebula') as session:
-    session.execute('USE basketballplayer;')
-    result = session.execute('SHOW TAGS;')
-    print(result)
-
-# Close the connection pool.
-connection_pool.close()
-```
-
-### Connect to the Storage Server
-
-```python
-# Set the IP addresses of all Meta servers.
-meta_cache = MetaCache([('192.168.xx.1', 9559),
-                        ('192.168.xx.2', 9559),
-                        ('192.168.xx.3', 9559)],
-                       50000)
-graph_storage_client = GraphStorageClient(meta_cache)
-
-resp = graph_storage_client.scan_vertex(
-        space_name='ScanSpace',
-        tag_name='person')
-while resp.has_next():
-    result = resp.next()
-    for vertex_data in result:
-        print(vertex_data)
-
-resp = graph_storage_client.scan_edge(
-    space_name='ScanSpace',
-    edge_name='friend')
-while resp.has_next():
-    result = resp.next()
-    for edge_data in result:
-        print(edge_data)
-```
+This section shows the core of the example code. For all the code, see [Example](https://github.com/vesoft-inc/nebula-python/tree/{{python.branch}}/example).

docs-2.0/14.client/6.nebula-go-client.md

@@ -19,7 +19,7 @@ You have installed Golang 1.13 or later versions.
 - (Recommended) To install a specific version of Nebula Go, use the Git option `--branch` to specify the branch. For example, to install v{{ go.release }}, run the following command:
 
   ```bash
-  $ git clone --branch v{{ go.release }} https://github.com/vesoft-inc/nebula-go.git
+  $ git clone --branch {{go.branch}} https://github.com/vesoft-inc/nebula-go.git
   ```
 
 - To install the daily development version, run the following command to download the source code from the `master` branch:
@@ -36,43 +36,8 @@ Run the following command to install or update Nebula Go:
 $ go get -u -v github.com/vesoft-inc/nebula-go@<tag>
 ```
 
-`tag`: Specify the branch, such as `master` or `v{{ go.release }}`.
+`tag`: Specify the branch, such as `master` or `{{go.branch}}`.
 
 ## Core of the example code
 
-This section shows the core of the example code. For all the code, see [graph_client_basic_example](https://github.com/vesoft-inc/nebula-go/blob/master/basic_example/graph_client_basic_example.go) and [graph_client_goroutines_example](https://github.com/vesoft-inc/nebula-go/blob/master/gorountines_example/graph_client_goroutines_example.go).
-
-```bash
-const (
-	address = "192.168.xx.1"
-	port     = 9669
-	username = "root"
-	password = "nebula"
-)
-
-func main() {
-	hostAddress := nebula.HostAddress{Host: address, Port: port}
-	hostList := []nebula.HostAddress{hostAddress}
-	testPoolConfig := nebula.GetDefaultConf()
-	pool, err := nebula.NewConnectionPool(hostList, testPoolConfig, log)
-	defer pool.Close()
-	session, err := pool.GetSession(username, password)
-	defer session.Release()
-
-	checkResultSet := func(prefix string, res *nebula.ResultSet) {
-		if !res.IsSucceed() {
-			log.Fatal(fmt.Sprintf("%s, ErrorCode: %v, ErrorMsg: %s", prefix, res.GetErrorCode(), res.GetErrorMsg()))
-		}
-	}
-	{
-		createSchema := "CREATE SPACE IF NOT EXISTS basic_example_space(vid_type=FIXED_STRING(20)); " +
-			"USE basic_example_space;" +
-			"CREATE TAG IF NOT EXISTS person(name string, age int);" +
-			"CREATE EDGE IF NOT EXISTS like(likeness double)"
-		resultSet, err := session.Execute(createSchema)
-		checkResultSet(createSchema, resultSet)
-	}
-	fmt.Print("\n")
-	log.Info("Nebula Go Client Basic Example Finished")
-}
-```
+This section shows the core of the example code. For all the code, see [graph_client_basic_example](https://github.com/vesoft-inc/nebula-go/blob/{{go.branch}}/basic_example/graph_client_basic_example.go) and [graph_client_goroutines_example](https://github.com/vesoft-inc/nebula-go/blob/{{go.branch}}/gorountines_example/graph_client_goroutines_example.go).

docs-2.0/nebula-exchange/ex-ug-FAQ.md

@@ -56,7 +56,7 @@ $SPARK_HOME/bin/spark-submit --class com.vesoft.nebula.exchange.Exchange \
 --files application.conf \
 --conf spark.driver.extraClassPath=./ \
 --conf spark.executor.extraClassPath=./ \
-nebula-exchange-2.0.0.jar \
+nebula-exchange-3.0.0.jar \
 -c application.conf
 ```
 
@@ -123,7 +123,7 @@ Namely:
 --conf spark.driver.extraJavaOptions=-Dfile.encoding=utf-8 \
 --conf spark.executor.extraJavaOptions=-Dfile.encoding=utf-8 \
 --class com.vesoft.nebula.exchange.Exchange \
-<nebula-exchange-2.x.y.jar_path> -c <application.conf_path>
+<nebula-exchange-3.x.y.jar_path> -c <application.conf_path>
 ```
 
 In YARN, use the following command:
@@ -137,7 +137,7 @@ In YARN, use the following command:
 --conf spark.executor.extraClassPath=./ \
 --conf spark.driver.extraJavaOptions=-Dfile.encoding=utf-8 \
 --conf spark.executor.extraJavaOptions=-Dfile.encoding=utf-8 \
-<nebula-exchange-2.x.y.jar_path> \
+<nebula-exchange-3.x.y.jar_path> \
 -c application.conf
 ```
 

docs-2.0/nebula-exchange/use-exchange/ex-ug-import-from-sst.md

@@ -168,7 +168,7 @@ After Exchange is compiled, copy the conf file `target/classes/application.conf`
   # Spark configuration
   spark: {
     app: {
-      name: Nebula Exchange 2.0
+      name: Nebula Exchange {{exchange.release}}
     }
 
     master:local