Glassfish example source code file (GenericCreateCommand.java)

This example Glassfish source code file (GenericCreateCommand.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, configbeanproxy, creationdecorator, crudresolver, exception, exception, genericcommandmodel, injectionmanager, javabean, list, log, logging, object, object, reflection, string, string, transactionfailure, transactionfailure, util

The Glassfish GenericCreateCommand.java source code

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 *
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 * General Public License Version 2 only ("GPL") or the Common Development
 * 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
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
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package org.glassfish.config.support;

import com.sun.enterprise.util.LocalStringManagerImpl;
import com.sun.enterprise.util.ExceptionUtil;
import com.sun.hk2.component.InjectionResolver;
import org.glassfish.api.ActionReport;
import org.glassfish.api.I18n;
import org.glassfish.api.admin.*;
import org.glassfish.api.admin.config.Named;
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 com.sun.logging.LogDomains;

import java.lang.reflect.InvocationTargetException;
import java.util.List;
import java.util.logging.Logger;
import java.util.logging.Level;
import java.beans.PropertyVetoException;

/**
 * Generic create command implementation.
 *
 * This command can create POJO configuration objects from an asadmin command
 * invocation parameters.
 *
 * So far, such POJO must be ConfigBeanProxy subclasses and be annotated with the
 * {@link org.glassfish.api.Param} annotation to property function. 
 *
 * @author Jerome Dochez
 */
@Scoped(PerLookup.class)
public class GenericCreateCommand extends GenericCrudCommand implements AdminCommand, PostConstruct, CommandModelProvider {

    @Inject
    Habitat habitat;
    
    Class<? extends CrudResolver> resolverType;
    GenericCommandModel model;
    Create create;

    final static Logger logger = LogDomains.getLogger(GenericCreateCommand.class, LogDomains.ADMIN_LOGGER);

    public void postConstruct() {

        super.postConstruct();

        create = getAnnotation(targetMethod, Create.class);
        resolverType = create.resolver();
        try {
            model = new GenericCommandModel(targetType, true, create.cluster(), create.i18n(),
                    new LocalStringManagerImpl(targetType),
                    habitat.getComponent(DomDocument.class),
                    commandName, create.resolver(), create.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);

        }

    }




    public void execute(final AdminCommandContext context) {

        final ActionReport result = context.getActionReport();
        
        // 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 parentBean = resolver.resolve(context, parentType);
        if (parentBean==null) {
            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                    "GenericCreateCommand.target_object_not_found",
                    "The CrudResolver {0} could not find the configuration object of type {1} where instances of {2} should be added",
                    resolver.getClass().toString(), parentType, targetType);
            result.failure(logger, msg);
            return;
        }
        
        try {
            ConfigSupport.apply(new SingleConfigCode<ConfigBeanProxy> () {
                public Object run(ConfigBeanProxy writableParent) throws PropertyVetoException, TransactionFailure {


                    ConfigBeanProxy childBean = writableParent.createChild(targetType);
                    manager.inject(childBean, targetType, getInjectionResolver());

                    String name = null;
                    if (Named.class.isAssignableFrom(targetType)) {
                        name = ((Named) childBean).getName();

                    }

                    // check that such instance does not exist yet...
                    if (name!=null) {
                        Object cbp = habitat.getComponent(targetType.getName(), name);
                        if (cbp!=null) {
                            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                                    "GenericCreateCommand.already_existing_instance",
                                    "A {0} instance with a \"{1}\" name already exist in the configuration",
                                    targetType.getSimpleName(), name);
                            result.failure(logger, msg);
                            throw new TransactionFailure(msg);
                        }
                    }

                    try {
                        if (targetMethod.getParameterTypes().length==0) {
                            // return type must be a list to which we add our child.
                            Object result = targetMethod.invoke(writableParent);
                            if (result instanceof List) {                                
                                List<ConfigBeanProxy> children = List.class.cast(result);
                                children.add(childBean);
                            }
                        } else {
                            targetMethod.invoke(writableParent, childBean);
                        }
                    } catch (Exception e) {
                        String msg = localStrings.getLocalString(GenericCrudCommand.class,
                                "GenericCrudCommand.method_invocation_exception",
                                "Exception while invoking {0} method : {1}",
                                targetMethod.toString(), e.toString());
                        result.failure(logger, msg, e);
                        throw new TransactionFailure(msg,e);
                    }

                    CreationDecorator<ConfigBeanProxy> decorator = habitat.getComponent(create.decorator());
                    if (decorator==null) {
                        String msg = localStrings.getLocalString(GenericCrudCommand.class,
                                "GenericCreateCommand.decorator_not_found",
                                "The CreationDecorator {0} could not be found in the habitat, is it annotated with @Service ?",
                                create.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, childBean);
                    }

                    return childBean;
                }
            }, parentBean);
        } catch(TransactionFailure e) {
            String msg = localStrings.getLocalString(GenericCrudCommand.class,
                    "GenericCreateCommand.transaction_exception",
                    "Exception while adding the new configuration : {0} ",
                    getRootCauseMessage(e));
            result.failure(logger, msg);
        }
    }

    public CommandModel getModel() {
        return model;
    }

    /**
     * Return the message from the root cause of the exception. If the root
     * cause has no message, then return the passed exception's message.
     */
    private String getRootCauseMessage(Exception e) {
        String msg = ExceptionUtil.getRootCause(e).getMessage();
        if (msg != null && msg.length() > 0) {
            return msg;
        } else {
            return e.getMessage();
        }
    }

}