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Cayenne Object Persistence Framework

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package org.apache.cayenne.remote.hessian;

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

import org.apache.cayenne.remote.RemoteSession;

/**
 * A proxy factory that handles HTTP sessions.
 * 
 * @author Andrus Adamchik
 * @since 1.2
 */
class HessianProxyFactory extends com.caucho.hessian.client.HessianProxyFactory {

    static final String SESSION_COOKIE_NAME = "JSESSIONID";

    private HessianConnection clientConnection;

    HessianProxyFactory(HessianConnection clientConnection) {
        this.clientConnection = clientConnection;
    }

    protected URLConnection openConnection(URL url) throws IOException {
        URLConnection connection = super.openConnection(url);

        // unfortunately we can't read response cookies without completely reimplementing
        // 'HessianProxy.invoke()'. Currently (3.0.13) it doesn't allow to cleanly
        // intercept response... so extract session id from the RemoteSession....

        // add session cookie
        RemoteSession session = clientConnection.getSession();
        if (session != null && session.getSessionId() != null) {
            connection.setRequestProperty("Cookie", SESSION_COOKIE_NAME
                    + "="
                    + session.getSessionId());
        }

        return connection;
    }
}