Glassfish example source code file (GenericDeleteCommand.java)

This example Glassfish source code file (GenericDeleteCommand.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

bean, commandmodel, configbeanproxy, configbeanproxy, copyconfig, crudresolver, crudresolver, deletiondecorator, inject, injectionmanager, javabean, override, override, reflection, string, string, transactionfailure

The Glassfish GenericDeleteCommand.java source code

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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.config.support;

import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.hk2.component.InjectionResolver;
import com.sun.enterprise.config.serverbeans.CopyConfig;
import org.glassfish.api.ActionReport;
import org.glassfish.api.admin.*;
import org.glassfish.common.util.admin.GenericCommandModel;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.component.*;
import org.jvnet.hk2.config.*;

import java.beans.PropertyVetoException;
import java.lang.reflect.Proxy;

/**
 * Implementation of the generic delete command
 *
 * @author Jerome Dochez
 */
@Scoped(PerLookup.class)
public class GenericDeleteCommand extends GenericCrudCommand implements AdminCommand, PostConstruct, CommandModelProvider {

    @Inject
    Habitat habitat;

    @Inject
    CommandRunner runner;


    Class<? extends CrudResolver> resolverType;
    CommandModel model;
    Delete delete;    
    
    @Override
    public CommandModel getModel() {
        return model;
    }
       
    @Override
    public void postConstruct() {

        super.postConstruct();
        delete = targetMethod.getAnnotation(Delete.class);
        resolverType = delete.resolver();
        try {
            // we pass false for "useAnnotations" as the @Param declarations on
	    // the target type are not used for the Delete method parameters.
            model = new GenericCommandModel(targetType, false, delete.cluster(), delete.i18n(),
                    new LocalStringManagerImpl(targetType),
                    habitat.getComponent(DomDocument.class), commandName,
                    delete.resolver(), delete.decorator());
            if (logger.isLoggable(level)) {
                for (String paramName : model.getParametersNames()) {
                    CommandModel.ParamModel param = model.getModelFor(paramName);
                    logger.fine("I take " + param.getName() + " parameters");
                }
            }
        } catch(Exception e) {
            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                    "GenericCreateCommand.command_model_exception",
                    "Exception while creating the command model for the generic command {0} : {1}",
                    commandName, e.getMessage());
            logger.severe(msg);
            throw new ComponentException(msg, e);

        }

    }

    @Override
    public void execute(final AdminCommandContext context) {

        final ActionReport result = context.getActionReport();

        //check if cluster software is installed else fail , see issue 12023
        //This will be revisited with issue 12900
        final CopyConfig command = (CopyConfig) runner
                .getCommand("copy-config", context.getActionReport(), context.getLogger());
        if (command == null ) {
            String msg = localStrings.getLocalString("cannot.execute.command",
                    "Cluster software is not installed");
            result.failure(logger,msg) ;
            return;
        }

        // inject resolver with command parameters...
        final InjectionManager manager = new InjectionManager();

        CrudResolver resolver = habitat.getComponent(resolverType);

        final InjectionResolver paramResolver = getInjectionResolver();

        manager.inject(resolver, paramResolver);

        final ConfigBeanProxy target = resolver.resolve(context, targetType);
        if (target==null) {
            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                    "GenericDeleteCommand.target_object_not_found",
                    "The CrudResolver {0} could not find the configuration object of type {1} where instances of {2} should be removed",
                    resolver.getClass().toString(), parentType, targetType);
            result.failure(logger, msg);
            return;
        }
        final ConfigBean child = (ConfigBean) ConfigBean.unwrap(target);

        try {
            ConfigBeanProxy parentProxy = child.parent().createProxy();
            ConfigSupport.apply(new SingleConfigCode<ConfigBeanProxy>() {
                @Override
                public Object run(ConfigBeanProxy parentProxy) throws PropertyVetoException, TransactionFailure {
                    ConfigSupport._deleteChild(child.parent(), (WriteableView) Proxy.getInvocationHandler(parentProxy), child);

                    DeletionDecorator<ConfigBeanProxy, ConfigBeanProxy> decorator = habitat.getComponent(delete.decorator());
                    if (decorator==null) {
                        String msg = localStrings.getLocalString(GenericCrudCommand.class,
                                "GenericCreateCommand.deletion_decorator_not_found",
                                "The DeletionDecorator {0} could not be found in the habitat,is it annotated with @Service ?",
                                delete.decorator().toString());
                        result.failure(logger, msg);
                        throw new TransactionFailure(msg);
                    } else {
                        // inject the decorator with any parameters from the initial CLI invocation
                        manager.inject(decorator, paramResolver);

                        // invoke the decorator
                        decorator.decorate(context, parentProxy, target);

                    }
                    return null;
                }
            }, parentProxy);


        } catch(TransactionFailure e) {
            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                    "GenericDeleteCommand.transaction_exception",
                    "Exception while deleting the configuration {0} :{1}",
                    child.typeName(), e.getMessage());
            result.failure(logger, msg);
        }

    }
}