javaee/services/DataSourceDefinitionProxy.java

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package org.glassfish.javaee.services;

import org.glassfish.api.naming.NamingObjectProxy;
import org.glassfish.internal.api.Globals;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.component.PerLookup;
import org.jvnet.hk2.component.Habitat;

import javax.naming.Context;
import javax.naming.NamingException;

import com.sun.enterprise.deployment.DataSourceDefinitionDescriptor;
import com.sun.appserv.connectors.internal.spi.ResourceDeployer;
import com.sun.appserv.connectors.internal.api.ConnectorsUtil;

import java.io.Serializable;
import java.util.Collection;

/**
 * This resource proxy will not bind the actual object upon first lookup unlike
 * org.glassfish.javaee.services.ResourceProxy. <br><br>
 * It holds the information required to get the actual object upon requests.<br>
 *
 * This is used for @DataSourceDefinition<br>
 * Upon first lookup, the datasource is created, deployed and the internal jndi-name is given to the
 * proxy, using the internal jndi-name actual resource is returned.<br>
 * On further lookups, internal jndi-name is used to get the actual resource.<br>
 *
 */
@Service
@Scoped(PerLookup.class)
public class DataSourceDefinitionProxy implements NamingObjectProxy.InitializationNamingObjectProxy, Serializable {
    @Inject
    private transient Habitat habitat;
    private DataSourceDefinitionDescriptor desc;
    private String actualResourceName;

    public Object create(Context ic) throws NamingException {
        if(actualResourceName == null){

            actualResourceName = ConnectorsUtil.deriveDataSourceDefinitionResourceName
                    (desc.getResourceId(), desc.getName());

            try{
                if(habitat == null){
                    habitat = Globals.getDefaultHabitat();
                    if(habitat == null){
                        throw new NamingException("Unable to create resource " +
                                "["+ desc.getName() +" ] as habitat is null");
                    }
                }
                getResourceDeployer(desc, habitat.getAllByContract(ResourceDeployer.class)).deployResource(desc);
            }catch(Exception e){
                NamingException ne = new NamingException("Unable to create resource ["+ desc.getName() +" ]");
                ne.initCause(e);
                throw ne;
            }
        }
        return ic.lookup(actualResourceName);
    }

    public void setDescriptor(DataSourceDefinitionDescriptor desc){
        this.desc = desc;
    }

    private ResourceDeployer getResourceDeployer(Object resource, Collection<ResourceDeployer> deployers) {
        ResourceDeployer resourceDeployer = null;
        for(ResourceDeployer deployer : deployers){
            if(deployer.handles(resource)){
                resourceDeployer = deployer;
                break;
            }
        }
        return resourceDeployer;
    }
}