co.cask.cdap.security.runtime.AuthenticationServerMain.java Source code

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Here is the source code for co.cask.cdap.security.runtime.AuthenticationServerMain.java

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/*
 * Copyright  2014 Cask Data, Inc.
 *
 * 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 co.cask.cdap.security.runtime;

import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.common.guice.ConfigModule;
import co.cask.cdap.common.guice.DiscoveryRuntimeModule;
import co.cask.cdap.common.guice.IOModule;
import co.cask.cdap.common.guice.ZKClientModule;
import co.cask.cdap.common.kerberos.SecurityUtil;
import co.cask.cdap.common.runtime.DaemonMain;
import co.cask.cdap.security.guice.SecurityModules;
import co.cask.cdap.security.server.ExternalAuthenticationServer;
import com.google.common.util.concurrent.Futures;
import com.google.inject.Guice;
import com.google.inject.Injector;
import org.apache.twill.internal.Services;
import org.apache.twill.zookeeper.ZKClientService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Server for authenticating clients accessing CDAP.  When a client authenticates successfully, it is issued
 * an access token containing a verifiable representation of the client's identity.  Other CDAP services
 * (such as the router) can independently verify client identities based on the token contents.
 */
public class AuthenticationServerMain extends DaemonMain {
    private static final Logger LOG = LoggerFactory.getLogger(AuthenticationServerMain.class);
    private ZKClientService zkClientService;
    private ExternalAuthenticationServer authServer;
    private CConfiguration configuration;

    @Override
    public void init(String[] args) {
        Injector injector = Guice.createInjector(new ConfigModule(), new IOModule(),
                new SecurityModules().getDistributedModules(), new DiscoveryRuntimeModule().getDistributedModules(),
                new ZKClientModule());
        configuration = injector.getInstance(CConfiguration.class);

        if (configuration.getBoolean(Constants.Security.ENABLED)) {
            this.zkClientService = injector.getInstance(ZKClientService.class);
            this.authServer = injector.getInstance(ExternalAuthenticationServer.class);
        }
    }

    @Override
    public void start() {
        if (authServer != null) {
            try {
                LOG.info("Starting AuthenticationServer.");

                // Enable Kerberos login
                SecurityUtil.enableKerberosLogin(configuration);

                Services.chainStart(zkClientService, authServer);
            } catch (Exception e) {
                LOG.error("Got exception while starting authenticaion server", e);
            }
        } else {
            String warning = "AuthenticationServer not started since security is disabled."
                    + " To enable security, set \"security.enabled\" = \"true\" in cdap-site.xml"
                    + " and edit the appropriate configuration.";
            LOG.warn(warning);
        }
    }

    @Override
    public void stop() {
        if (authServer != null) {
            LOG.info("Stopping AuthenticationServer.");
            Futures.getUnchecked(Services.chainStop(authServer, zkClientService));
        }
    }

    @Override
    public void destroy() {
    }

    public static void main(String[] args) throws Exception {
        new AuthenticationServerMain().doMain(args);
    }
}