Configuring and Importing a Sample Project

Updated on 2024-08-12 GMT+08:00

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Background

You can obtain the HBase development sample project and import the project to IntelliJ IDEA.

Prerequisites

Ensure that the difference between the time on the local PC and the cluster time is less than 5 minutes. If the time difference cannot be determined, contact the system administrator. You can view the time of the cluster in the lower-right corner on the FusionInsight Manager page.
You have prepared the development environment and MRS cluster configuration files. For details, see Preparing the Configuration Files for Connecting to the Cluster.

Procedure

Obtain the sample project from the src directory in the directory where the sample code is decompressed by referring to Obtaining the MRS Application Development Sample Project. You can select a sample based on the actual service scenario. For details about the samples, see HBase Sample Project.

If you need to debug the sample code on the local Windows PC, place the configuration files and authentication files required by each sample project as required in Table 1.

**Table 1** Configuration files and authentication files required by each sample project
Sample Project Location	Configuration/Authentication Files
hbase-examples/hbase-example (for single cluster)	Place the following files in the ../src/main/resources/conf directory of the sample project: Configuration files: core-site.xml, hbase-site.xml, and hdfs-site.xml obtained in Preparing the Configuration Files of the Running Environment Authentication files: user.keytab and krb5.conf obtained in Preparing User Information for Cluster Authentication
hbase-examples/hbase-example (mutual trusted clusters)	Place the authentication credential of the shared user and the configuration files of one cluster to the ../src/main/resources/hadoopDomain directory, and place the configuration files of the other cluster to the ../src/main/resources/hadoop1Domain directory. Configuration files: core-site.xml, hbase-site.xml, and hdfs-site.xml obtained in Preparing the Configuration Files of the Running Environment Authentication files: user.keytab and krb5.conf obtained in Preparing User Information for Cluster Authentication
hbase-examples/hbase-rest-example	Place the keytab authentication files user.keytab and krb5.conf obtained in Preparing User Information for Cluster Authentication to ../src/main/resources/conf. If the conf directory does not exist, create one.
hbase-examples/hbase-thrift-example	Place the following files in ../src/main/resources/conf of the sample project: Configuration files: hdfs-site.xml, core-site.xml, and hbase-site.xml obtained in Preparing the ThriftServer Instance Configuration Files Authentication files: user.keytab and krb5.conf obtained in Preparing User Information for Cluster Authentication
hbase-examples/hbase-zk-example	Place the following files in the ../src/main/resources directory of the sample project: Configuration files: core-site.xml, hbase-site.xml, and hdfs-site.xml obtained in Preparing the Configuration Files of the Running Environment Authentication files: user.keytab and krb5.conf obtained in Preparing User Information for Cluster Authentication Ensure that the zoo.cfg and jaas.conf files required for Authentication for Accessing Multiple ZooKeepers are placed in the directory.

After the IntelliJ IDEA and JDK tools are installed, configure the JDK in IntelliJ IDEA.
1. Start IntelliJ IDEA and choose Configure.
  Figure 1 Quick Start
2. Select Structure for New Projects from the drop-down list.
  Figure 2 Configure
3. On the displayed Project Structure for New Projects page, select SDKs, click the plus sign (+), and click JDK.
  Figure 3 Project Structure for New Projects
4. On the Select Home Directory for JDK page that is displayed, select the JDK directory and click OK.
  Figure 4 Select Home Directory for JDK
5. After selecting the JDK, click OK to complete the configuration.
  Figure 5 Completing the JDK configuration
NOTE:

The operation procedure may vary according to the IDEA version.
Import the sample project to the IntelliJ IDEA development environment.
1. Start the IntelliJ IDEA, and click Open or Import on the quick start page.
  For the IDEA tool that has been used, you can choose File > Import project... on the main interface to import the sample project.
  
  Figure 6 Open or Import (Quick Start page)
2. Select the sample project folder hbase-example and click OK.
  Figure 7 Selecting a file or directory to import
3. After the import is complete, check that the imported sample projects are displayed on the IDEA home page.
  Figure 8 Successfully importing sample projects
4. Right-click pom.xml and choose Add as Maven Project from the shortcut menu to add the project as a Maven project. If the "pom.xml" icon is displayed as , go to the next step.
  Figure 9 Adding as a Maven project
  
  In this case, the IDEA can identify the project as a Maven project.
  
  Figure 10 Sample project displayed in IDEA as a Maven project
Set the Maven version used by the project.
1. Choose File > Settings... from the main menu of IntelliJ IDEA.
  Figure 11 Settings
2. Choose Build, Execution, Deployment > Maven and set Maven home directory to the Maven version installed on the local PC.
  Set User settings file and Local repository as you need, and click Apply > OK.
  Figure 12 Selecting the local Maven installation directory
Set the IntelliJ IDEA text file coding format to prevent garbled characters.
1. Choose File > Settings... from the main menu of IntelliJ IDEA.
  Figure 13 Settings
2. In the navigation tree of the Settings page, choose Editor > File Encodings, and select UTF-8 for both Global Encoding and Project Encoding.
  Figure 14 File encodings
3. Click Apply and OK to complete the configuration.