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/*
   Copyright 2015 Ant Kutschera

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package ch.maxant.generic_jca_adapter;

import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;
import java.util.logging.Logger;

import javax.resource.ResourceException;
import javax.resource.spi.ActivationSpec;
import javax.resource.spi.BootstrapContext;
import javax.resource.spi.Connector;
import javax.resource.spi.ResourceAdapter;
import javax.resource.spi.ResourceAdapterInternalException;
import javax.resource.spi.TransactionSupport.TransactionSupportLevel;
import javax.resource.spi.endpoint.MessageEndpointFactory;
import javax.transaction.xa.XAResource;

import ch.maxant.generic_jca_adapter.TransactionAssistanceFactory.CommitRollbackRecoveryCallback;

/** A resource adapter able to bind callbacks into XA */
@Connector(licenseRequired=true, transactionSupport = TransactionSupportLevel.XATransaction)
public class GenericResourceAdapter implements ResourceAdapter {

    private final Logger log = Logger.getLogger(this.getClass().getName());

    private Map commitRollbackRecoveryCallbacks = new HashMap();
    
    @Override
    public void endpointActivation(MessageEndpointFactory endpointFactory, ActivationSpec spec) throws ResourceException {
        log.log(Level.INFO, "activating endpoint");
    }

    @Override
    public void endpointDeactivation(MessageEndpointFactory endpointFactory, ActivationSpec spec) {
        log.log(Level.INFO, "deactivating endpoint");
    }

    @Override
    public void start(BootstrapContext ctx) throws ResourceAdapterInternalException {
        log.log(Level.INFO, "starting resource adapter");
    }

    @Override
    public void stop() {
        log.log(Level.INFO, "stopping resource adapter");
    }

    @Override
    public XAResource[] getXAResources(ActivationSpec[] specs) throws ResourceException {
        log.log(Level.INFO, "getting xa resources");
        //TODO never seen this method called by Jboss! therefore:
        throw new ResourceException("not supported - altho we can if its necessary...");
        //TODO is returning one enough?
        //return new XAResource[]{new TransactionAssistanceXAResource(new ManagedTransactionAssistance())};
    }

    @Override
    public int hashCode() {
        return 69;
        }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        return true;
        }

    /** client code can register a callback to enable commit, rollback and recovery */
    synchronized void registerCommitRollbackRecovery(String managedConnectionFactoryId, CommitRollbackRecoveryCallback commitRollbackRecoveryCallback) {
        if(this.commitRollbackRecoveryCallbacks.containsKey(managedConnectionFactoryId)){
            throw new IllegalStateException("Unable to register commit/rollback/recovery for managed connection factory with ID '" + managedConnectionFactoryId + "', because a callback has already been registered. Please unregister it first!");
            }
        this.commitRollbackRecoveryCallbacks.put(managedConnectionFactoryId, commitRollbackRecoveryCallback);
        }
    
    /** client code can unregister the callback which was registered using {@link #registerCommitRollbackRecovery(String, CommitRollbackRecoveryCallback)} */
    synchronized void unregisterCommitRollbackRecovery(String managedConnectionFactoryId){
        this.commitRollbackRecoveryCallbacks.remove(managedConnectionFactoryId);
    }

    /** get the callback registered using {@link #registerCommitRollbackRecovery(String, CommitRollbackRecoveryCallback)} */
    CommitRollbackRecoveryCallback getCommitRollbackRecoveryCallback(String managedConnectionFactoryId) {
        return commitRollbackRecoveryCallbacks.get(managedConnectionFactoryId);
    }
}