Examples of Extending the asadmin Utility

Example 4–5 Example asadmin Command With Empty execute Method

This example shows a class that represents the asadmin command create-mycontainer.

The usage statement for this command is as follows:

asadmin create-mycontainer --originator any-character-string
[--description any-character-string]
[--enabled {true|false}]  any-character-string

This command uses injection to specify that a running domain is required.

package com.example.mycontainer;

import org.glassfish.api.admin.AdminCommand;
import org.glassfish.api.admin.AdminCommandContext;
import org.glassfish.api.I18n;
import org.glassfish.api.Param;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.component.PerLookup;

/**
 * Sample command
 */
@Service(name="create-mycontainer")
@Scoped(PerLookup.class)
public Class CreateMycontainer implements AdminCommand {

    @Inject
    Domain domain;

    @Param
    String originator;

    @Param(name="description", optional=true)
    @I18n("mydesc")
    String mycontainerDescription

    @Param (acceptableValues="true,false", defaultValue="false", optional=true)
    String enabled
    
    @Param(primary=true)
    String containername;

    /**
     * Executes the command with the command parameters passed as Properties 
     * where the keys are the paramter names and the values the parameter values
     * @param context information 
     */
    public void execute(AdminCommandContext context) {
        // domain and originator are not null
        // mycontainerDescription can be null.
    }
}

The following message text strings are defined in the file LocalStrings.properties for use by the command:

create-mycontainer.command=Creates a custom container
create-mycontainer.command.originator=The originator of the container 
create-mycontainer.command.mydesc=A description of the container
create-mycontainer.command.enabled=Whether the container is enabled or disabled
create-mycontainer.command.containername=The container name

Example 4–6 Fully Functional asadmin Command

This example shows a class that represents the asadmin command list-runtime-environment. The command determines the operating system or runtime information for Enterprise Server

The usage statement for this command is as follows:

asadmin list-runtime-environment{runtime|os}

package com.example.env.cli;

import org.glassfish.api.admin.AdminCommand;
import org.glassfish.api.admin.AdminCommandContext;
import org.glassfish.api.ActionReport;
import org.glassfish.api.I18n;
import org.glassfish.api.ActionReport.ExitCode;
import org.glassfish.api.Param;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.component.PerLookup;

import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.lang.management.RuntimeMXBean;

/**
 * Demos asadmin CLI extension
 *
  */
@Service(name="list-runtime-environment")
@Scoped(PerLookup.class)
public class ListRuntimeEnvironmentCommand implements AdminCommand {
    
    // this value can be either runtime or os for our demo
    @Param(primary=true)
    String inParam;
    
    public void execute(AdminCommandContext context) {

        ActionReport report = context.getActionReport();
        report.setActionExitCode(ExitCode.SUCCESS);

        // If the inParam is 'os' then this command returns operating system info
        // and if the inParam is 'runtime' then it returns runtime info.
        // Both of the above are based on mxbeans.

        if ("os".equals(inParam)) {
            OperatingSystemMXBean osmb = ManagementFactory.getOperatingSystemMXBean();
            report.setMessage("Your machine operating system name = " + osmb.getName());
        } else if ("runtime".equals(inParam)) {
            RuntimeMXBean rtmb = ManagementFactory.getRuntimeMXBean();
            report.setMessage("Your JVM name = " + rtmb.getVmName());
        } else {
            report.setActionExitCode(ExitCode.FAILURE);
            report.setMessage("operand should be either 'os' or 'runtime'");
        }

    }
}