com.moss.identity.veracity.VeracityProxyFactory.java Source code

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Here is the source code for com.moss.identity.veracity.VeracityProxyFactory.java

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/**
 * Copyright (C) 2013, Moss Computing Inc.
 *
 * This file is part of veracity.
 *
 * veracity is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * veracity is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with veracity; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA.
 *
 * Linking this library statically or dynamically with other modules is
 * making a combined work based on this library.  Thus, the terms and
 * conditions of the GNU General Public License cover the whole
 * combination.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent
 * modules, and to copy and distribute the resulting executable under
 * terms of your choice, provided that you also meet, for each linked
 * independent module, the terms and conditions of the license of that
 * module.  An independent module is a module which is not derived from
 * or based on this library.  If you modify this library, you may extend
 * this exception to your version of the library, but you are not
 * obligated to do so.  If you do not wish to do so, delete this
 * exception statement from your version.
 */
package com.moss.identity.veracity;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.moss.rpcutil.proxy.ProxyFactory;
import com.moss.rpcutil.proxy.ProxyProvider;
import com.moss.rpcutil.proxy.hessian.HessianProxyProvider;
import com.moss.rpcutil.proxy.jaxws.JAXWSProxyProvider;
import com.moss.veracity.api.Authentication;
import com.moss.veracity.api.Management;

public final class VeracityProxyFactory {

    public static final String PROXY_PROVIDER_PROPERTY = "proxyProvider";
    public static final ProxyProviderOption DEFAULT_OPTION = ProxyProviderOption.HESSIAN;

    public static enum ProxyProviderOption {
        JAXWS() {
            @Override
            public ProxyProvider makeProvider() {
                JAXWSProxyProvider prov = new JAXWSProxyProvider()
                        .register(Authentication.class, Authentication.QNAME)
                        .register(Management.class, Management.QNAME);
                return prov;
            }
        },
        HESSIAN() {
            @Override
            public ProxyProvider makeProvider() {
                return new HessianProxyProvider();
            }
        };

        abstract ProxyProvider makeProvider();
    }

    public static ProxyFactory create() {
        return create(null, DEFAULT_OPTION);
    }

    public static ProxyFactory create(ProxyProviderOption option) {
        return create(option, DEFAULT_OPTION);
    }

    private static ProxyFactory create(ProxyProviderOption option, ProxyProviderOption defaultOption) {

        Log log = LogFactory.getLog(VeracityProxyFactory.class);

        if (option == null) {

            if (log.isDebugEnabled()) {
                log.debug(
                        "No option was provided as an argument, attempting to determine option from system property '"
                                + PROXY_PROVIDER_PROPERTY + "'");
            }

            try {
                String prop = System.getProperty(PROXY_PROVIDER_PROPERTY);
                if (prop != null) {
                    option = ProxyProviderOption.valueOf(prop.toUpperCase());

                    if (option == null) {
                        if (log.isDebugEnabled()) {
                            log.debug("Could not determine option from system property '" + PROXY_PROVIDER_PROPERTY
                                    + "': " + prop);
                        }
                    } else {
                        if (log.isDebugEnabled()) {
                            log.debug("Determined option from system property '" + PROXY_PROVIDER_PROPERTY + "': "
                                    + option);
                        }
                    }
                } else {
                    if (log.isDebugEnabled()) {
                        log.debug("The system property '" + PROXY_PROVIDER_PROPERTY
                                + "' was not set, cannot use it to determine which option to use.");
                    }
                }
            } catch (Exception ex) {
                log.warn(
                        "Encountered unexpected failure while attempting to determine which option to use from system property '"
                                + PROXY_PROVIDER_PROPERTY + "'",
                        ex);
            }

            if (option == null) {
                if (defaultOption == null) {
                    throw new RuntimeException(
                            "No default option was provided, cannot determine which option to use for supplying the proxy provider.");
                } else {
                    if (log.isDebugEnabled()) {
                        log.debug("No specific option was chosen, using default option: " + defaultOption);
                    }
                    option = defaultOption;
                }
            }
        } else {
            if (log.isDebugEnabled()) {
                log.debug("Option " + option + " was provided as an argument, using it directly.");
            }
        }

        ProxyProvider prov = option.makeProvider();
        ProxyFactory factory = new ProxyFactory(prov);

        return factory;
    }
}