Compiling and Running an Application When No Client Is Installed

Updated on 2024-06-21 GMT+08:00

View PDF

Scenario

HBase applications can run in a Linux environment where an HBase client is not installed. After application code development is complete, you can upload a JAR file to the Linux environment to run applications.

Prerequisites

You have installed a JDK in the Linux environment. The version of the JDK must be consistent with that of the JDK used by Eclipse to export the JAR file.

Procedure

Export a JAR file.
1. Right-click the sample project and choose Export from the shortcut menu.
  Figure 1 Exporting a JAR file
2. Select JAR file and click Next.
  Figure 2 Selecting JAR file
3. Select the src directory, and export the JAR file to the specified location. Click Next twice.
  Figure 3 Selecting a path for exporting the JAR file
4. Click Finish. Exporting the JAR file is complete.
Prepare the required JAR file and configuration file.
1. In the Linux environment, create a directory, for example, /opt/test, and create subdirectories lib and conf. Upload the JAR file in lib in the sample project and the JAR file exported in 1 to the lib directory on Linux. Upload the configuration file in conf in the sample project to the conf directory on Linux.
2. In the /opt/test root directory, create the run.sh script, modify the following content, and save the file:
```
#!/bin/sh
BASEDIR=`pwd`
SECURE=""
if [ $# -eq 1 ]; then
  SECURE="-Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty -Dzookeeper.client.secure=true"
fi
cd ${BASEDIR}
for file in ${BASEDIR}/lib/*.jar
do
i_cp=$i_cp:$file
echo "$file"
done
for file in ${BASEDIR}/conf/*
do
i_cp=$i_cp:$file
done
java -cp .${i_cp} ${SECURE} com.huawei.cloudtable.hbase.examples.TestMain
```
Go to /opt/test and run the following command to run the JAR file:
- HBase clusters with the encryption stream disabled
  sh run.sh
- HBase clusters with the encryption stream enabled
  sh run.sh secure
  
  NOTE:
  
  If you use other methods to access an HBase cluster with the encryption stream enabled, you need to add the parameter "-Dzookeeper.clientCnxnSocket=org.apache.zookeeper.ClientCnxnSocketNetty -Dzookeeper.client.secure=true".