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Glassfish example source code file (LaunchSecurityHelper.java)

This example Glassfish source code file (LaunchSecurityHelper.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

buffer_size, bufferedreader, bufferedreader, error, io, ioexception, ioexception, net, network, permissions_template_name, permissions_template_name, policy, runtimeexception, security, string, string, stringbuilder, uri

The Glassfish LaunchSecurityHelper.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package org.glassfish.appclient.client.jws.boot;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.security.Policy;
import org.glassfish.appclient.client.acc.AppClientContainer;
import org.glassfish.appclient.client.acc.Util;

/**
 *
 * @author tjquinn
 */
public class LaunchSecurityHelper {

    private static final String PERMISSIONS_TEMPLATE_NAME = "jwsclient.policy";
    private static final String SYSTEM_CODEBASE_PROPERTY = "appclient.system.codebase";
    private static final int BUFFER_SIZE = 1024;

    public static void setPermissions() {
        try {
            /*
             * Get the permissions template and write it to a temporary file.
             */
            final String permissionsTemplate = loadResource(LaunchSecurityHelper.class, PERMISSIONS_TEMPLATE_NAME);

            /*
             * The Java security logic will process property references in
             * the policy file template automatically.
             */
            boolean retainTempFiles = Boolean.getBoolean(AppClientContainer.APPCLIENT_RETAIN_TEMP_FILES_PROPERTYNAME);
            File policyFile = Util.writeTextToTempFile(permissionsTemplate, "jwsacc", ".policy", retainTempFiles);
            refreshPolicy(policyFile);

        } catch (IOException ioe) {
            throw new RuntimeException("Error loading permissions template", ioe);
        }
    }

    /**
     * Retrieves a resource as a String.
     * <p>
     * This method does not save the template in a cache.  Use the instance method
     * getTemplate for that purpose.
     *
     * @param a class, the class loader of which should be used for searching for the template
     * @param the path of the resource to load, relative to the contextClass
     * @return the resource's contents
     * @throws IOException if the resource is not found or in case of error while loading it
     */
    private static String loadResource(Class contextClass, String resourcePath) throws IOException {
        String result = null;
        InputStream is = null;
        try {
            is = contextClass.getResourceAsStream(resourcePath);
            if (is == null) {
                throw new IOException("Could not locate the requested resource relative to class " + contextClass.getName());
            }

            StringBuilder sb = new StringBuilder();
            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            int charsRead;
            char [] buffer = new char [BUFFER_SIZE];
            while ((charsRead = reader.read(buffer)) != -1) {
                sb.append(buffer, 0, charsRead);
            }

            result= sb.toString();
            return result;
        } catch (IOException ioe) {
            IOException wrapperIOE = new IOException("Error loading resource " + resourcePath);
            wrapperIOE.initCause(ioe);
            throw wrapperIOE;
        } finally {
            if (is != null) {
                is.close();
            }
        }
    }
    /**
     * Locates the first free policy.url.x setting.
     * @return the int value for the first unused policy setting
     */
    private static int firstFreePolicyIndex() {
        int i = 0;
        String propValue;
        do {
            propValue = java.security.Security.getProperty("policy.url." + String.valueOf(++i));
        } while ((propValue != null) && ( ! propValue.equals("")));

        return i;
    }

    /**
     * Refreshes the current policy object using the contents of the specified file
     * as additional policy.
     * @param policyFile the file containing additional policy
     */
    private static void refreshPolicy(File policyFile) {
        int idx = firstFreePolicyIndex();
        URI policyFileURI = policyFile.toURI();
        java.security.Security.setProperty("policy.url." + idx, policyFileURI.toASCIIString());
        Policy p = Policy.getPolicy();
        p.refresh();
    }
}

Other Glassfish examples (source code examples)

Here is a short list of links related to this Glassfish LaunchSecurityHelper.java source code file:

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