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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2013 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:
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*
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* 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
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* 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
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*/
package com.sun.enterprise.admin.cli.remote;
import com.sun.appserv.management.client.prefs.LoginInfo;
import com.sun.appserv.management.client.prefs.LoginInfoStore;
import com.sun.appserv.management.client.prefs.LoginInfoStoreFactory;
import com.sun.appserv.management.client.prefs.StoreException;
import com.sun.enterprise.admin.cli.*;
import com.sun.enterprise.admin.cli.ProgramOptions.PasswordLocation;
import com.sun.enterprise.admin.remote.RemoteAdminCommand;
import com.sun.enterprise.admin.util.*;
import com.sun.enterprise.admin.util.CommandModelData.ParamModelData;
import com.sun.enterprise.module.*;
import com.sun.enterprise.module.single.StaticModulesRegistry;
import com.sun.enterprise.security.store.AsadminSecurityUtil;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
import com.sun.enterprise.util.SystemPropertyConstants;
import java.io.*;
import java.net.*;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;
import org.glassfish.common.util.admin.ManPageFinder;
import org.glassfish.hk2.api.ActiveDescriptor;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.hk2.utilities.BuilderHelper;
import org.jvnet.hk2.component.*;
/**
* A remote command handled by the asadmin CLI.
*/
public class RemoteCommand extends CLICommand {
private static final LocalStringsImpl strings =
new LocalStringsImpl(RemoteCommand.class);
// return output string rather than printing it
private boolean returnOutput = false;
private String output;
private boolean returnAttributes = false;
private Map attrs;
private String usage;
private String responseFormatType;
private OutputStream userOut;
private File outputDir;
private CLIRemoteAdminCommand rac;
/**
* A special RemoteAdminCommand that overrides methods so that
* we can handle the interactive requirements of a CLI command.
*/
private class CLIRemoteAdminCommand extends RemoteAdminCommand {
private static final String JSESSIONID = "JSESSIONID";
private static final String COOKIE_HEADER = "Cookie";
private CookieManager cookieManager = null;
private File sessionCache = null;
/**
* Construct a new remote command object. The command and arguments
* are supplied later using the execute method in the superclass.
*/
public CLIRemoteAdminCommand(String name, String host, int port,
boolean secure, String user, String password, Logger logger,
String authToken)
throws CommandException {
super(name, host, port, secure, user, password, logger, getCommandScope(),
authToken, true /* prohibitDirectoryUploads */);
StringBuilder sessionFilePath = new StringBuilder();
// Store the cache at: $GFCLIENT/cache/{host}_{port}/session
sessionFilePath.append("cache").append(File.separator);
sessionFilePath.append(host).append("_");
sessionFilePath.append(port).append(File.separator);
sessionFilePath.append("session");
sessionCache = new File(AsadminSecurityUtil.getDefaultClientDir(),
sessionFilePath.toString());
}
@Override
public void fetchCommandModel() throws CommandException {
super.fetchCommandModel();
}
/**
* If we're interactive, prompt for a new username and password.
* Return true if we're successful in collecting new information
* (and thus the caller should try the request again).
*/
@Override
protected boolean updateAuthentication() {
Console cons;
if (programOpts.isInteractive() &&
(cons = System.console()) != null) {
// if appropriate, tell the user why authentication failed
PasswordLocation pwloc = programOpts.getPasswordLocation();
if (pwloc == PasswordLocation.PASSWORD_FILE) {
logger.fine(strings.get("BadPasswordFromFile",
programOpts.getPasswordFile()));
} else if (pwloc == PasswordLocation.LOGIN_FILE) {
try {
LoginInfoStore store =
LoginInfoStoreFactory.getDefaultStore();
logger.fine(strings.get("BadPasswordFromLogin",
store.getName()));
} catch (StoreException ex) {
// ignore it
}
}
String user = null;
// only prompt for a user name if the user name is set to
// the default. otherwise, assume the user specified the
// correct username to begin with and all we need is the
// password.
if (programOpts.getUser() == null) {
cons.printf("%s ", strings.get("AdminUserPrompt"));
user = cons.readLine();
if (user == null)
return false;
}
String password;
String puser = ok(user) ? user : programOpts.getUser();
if (ok(puser))
password = readPassword(
strings.get("AdminUserPasswordPrompt", puser));
else
password = readPassword(strings.get("AdminPasswordPrompt"));
if (password == null)
return false;
if (ok(user)) { // if none entered, don't change
programOpts.setUser(user);
this.user = user;
}
programOpts.setPassword(password, PasswordLocation.USER);
this.password = password;
return true;
}
return false;
}
/**
* Get from environment.
*/
@Override
protected String getFromEnvironment(String name) {
return env.getStringOption(name);
}
/**
* Called when a non-secure connection attempt fails and it appears
* that the server requires a secure connection.
* Tell the user that we're retrying.
*/
@Override
protected boolean retryUsingSecureConnection(String host, int port) {
String msg = strings.get("ServerMaybeSecure", host, port + "");
logger.info(msg);
return true;
}
/**
* Return the error message to be used in the AuthenticationException.
* Subclasses can override to provide a more detailed message, for
* example, indicating the source of the password that failed.
*/
@Override
protected String reportAuthenticationException() {
String msg = null;
PasswordLocation pwloc =
programOpts.getPasswordLocation();
if (pwloc == PasswordLocation.PASSWORD_FILE) {
msg = strings.get("InvalidCredentialsFromFile",
programOpts.getUser(),
programOpts.getPasswordFile());
} else if (pwloc == PasswordLocation.LOGIN_FILE) {
try {
LoginInfoStore store =
LoginInfoStoreFactory.getDefaultStore();
msg = strings.get("InvalidCredentialsFromLogin",
programOpts.getUser(),
store.getName());
} catch (StoreException ex) {
// ignore it
}
}
if (msg == null)
msg = strings.get("InvalidCredentials", programOpts.getUser());
return msg;
}
/**
* Adds cookies to the header to support session based client
* routing.
*
* @param urlConnection
*/
@Override
protected synchronized void addAdditionalHeaders(final URLConnection urlConnection) {
addCookieHeaders(urlConnection);
}
/*
* Adds any cookies maintained in the clients session cookie cache.
*/
private void addCookieHeaders(final URLConnection urlConnection) {
// Get the last modified time of the session cache file.
long modifiedTime = sessionCache.lastModified();
if (modifiedTime == 0) {
// No session file so no cookies to add.
return;
}
// Remote any Set-Cookie's in the system cookie manager otherwise
// they appear as cookies in the outgoing request.
((CookieManager)CookieHandler.getDefault()).getCookieStore().removeAll();
cookieManager = new CookieManager(
new ClientCookieStore(
new CookieManager().getCookieStore(),
sessionCache),
CookiePolicy.ACCEPT_ALL);
// XXX: If this is an interactive command we don't want to
// keep reloading the cookie store.
try {
((ClientCookieStore) cookieManager.getCookieStore()).load();
} catch (IOException e) {
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to load cookies: " + e.toString());
return;
}
if (isSessionCookieExpired(cookieManager, modifiedTime)) {
logger.finer("Cookie session file has expired.");
if (!sessionCache.delete()) {
logger.finer("Unable to delete session file.");
}
return;
}
StringBuilder sb = new StringBuilder("$Version=1");
boolean hasCookies = false;
for (HttpCookie cookie: cookieManager.getCookieStore().getCookies()) {
hasCookies = true;
sb.append("; ").append(cookie.getName()).append("=").append(cookie.getValue());
}
if (hasCookies) {
urlConnection.setRequestProperty(COOKIE_HEADER, sb.toString());
}
}
/*
* Looks for the SESSIONID cookie in the cookie store and
* determines if the cookie has expired (based on the
* Max-Age and the time in which the file was last modified.)
* The assumption, based on how we write cookies, is that
* the cookie session file will only be changed when the
* JSESSIONID cookie changes. Therefor the last mod time of
* the file is a reasonable proxy for when the cookie was
* "created".
* If we can't find the JSESSIONID cookie then we return true.
*/
private boolean isSessionCookieExpired(CookieManager manager,
long creationTime) {
for (URI uri: manager.getCookieStore().getURIs()) {
for (HttpCookie cookie: manager.getCookieStore().get(uri)) {
if (cookie.getName().equals(JSESSIONID)) {
if ((creationTime / 1000 + cookie.getMaxAge()) <
System.currentTimeMillis()/1000) {
return true;
} else
return false;
}
}
}
return true;
}
/**
* Processes the headers to support session based client
* routing.
*
* @param urlConnection
*/
@Override
protected synchronized void processHeaders(final URLConnection urlConnection) {
processCookieHeaders(urlConnection);
}
private void processCookieHeaders(final URLConnection urlConnection) {
CookieManager systemCookieManager = (CookieManager)CookieManager.getDefault();
if (systemCookieManager == null) {
logger.finer("Assertion failed: null system CookieManager");
return;
}
// Using the system CookieHandler, retrieve any cookies.
CookieStore systemCookieJar = systemCookieManager.getCookieStore();
List newCookies = systemCookieJar.getCookies();
if (newCookies.isEmpty()) {
// If there are no cookies to set in the request we
// have nothing to do.
return;
}
/*
Console console = System.console();
for (HttpCookie cookie: newCookies) {
console.printf("Cookie: %s%n", cookie.toString());
console.printf(" MaxAge: %d%n", cookie.getMaxAge());
console.printf(" Domain: %s%n", cookie.getDomain());
console.printf(" Path: %s%n", cookie.getPath());
}
*
*/
// Get the last modified time of the session cache file.
if (sessionCache.lastModified() == 0) {
// No file, if we have cookies we need to save them.
if (cookieManager == null) {
cookieManager = new CookieManager(
new ClientCookieStore(
new CookieManager().getCookieStore(),
sessionCache),
CookiePolicy.ACCEPT_ALL);
}
try {
cookieManager.put(((ClientCookieStore)cookieManager.getCookieStore()).getStaticURI(),
urlConnection.getHeaderFields());
} catch (IOException e) {
// Thrown by cookieManger.put()
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to save cookies: " + e.toString());
return;
}
try {
((ClientCookieStore) cookieManager.getCookieStore()).store();
} catch (IOException e) {
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to store cookies: " + e.toString());
}
return;
}
if (cookieManager == null) {
cookieManager = new CookieManager(
new ClientCookieStore(
new CookieManager().getCookieStore(),
sessionCache),
CookiePolicy.ACCEPT_ALL);
try {
((ClientCookieStore) cookieManager.getCookieStore()).load();
} catch (IOException e) {
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to load cookies: " + e.toString());
return;
}
}
boolean newCookieFound = false;
// Check to see if any of the set cookies in the reply are
// different from what is already in the persistent store.
for (HttpCookie cookie: systemCookieJar.getCookies()) {
// Check to see if any of the set cookies in the reply are
// different from what is already in the persistent store.
int cookieIndex = cookieManager.getCookieStore().getCookies().indexOf(cookie);
if (cookieIndex == -1) {
newCookieFound = true;
break;
} else {
HttpCookie c1 = cookieManager.getCookieStore().getCookies().get(cookieIndex);
if (!c1.getValue().equals(cookie.getValue())) {
newCookieFound = true;
break;
}
}
}
// Note: This has the potential to overwrite the existing file
// which may contain changes that were introduced by another
// command's execution. Those changes will be lost.
// Since the cookie store is only used for optimized session
// routing we are only interested in preserving the last
// set of session/routing cookies received from the server/LB
// as we believe those to be the most current and accurate in
// regards to future request routing.
if (newCookieFound) {
try {
try {
cookieManager.put(((ClientCookieStore)cookieManager.getCookieStore()).getStaticURI(),
urlConnection.getHeaderFields());
} catch (IOException e) {
// Thrown by cookieManger.put()
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to save cookies: " +
e.toString());
return;
}
((ClientCookieStore) cookieManager.getCookieStore()).store();
} catch (IOException e) {
if (logger.isLoggable(Level.FINER))
logger.finer("Unable to store cookies: " + e.toString());
}
} else {
// No cookies changed. Update the modification time on the store.
((ClientCookieStore) cookieManager.getCookieStore()).touchStore();
}
}
}
/**
* A class loader for the "modules" directory.
*/
private static ClassLoader moduleClassLoader;
/**
* A habitat just for finding man pages.
*/
private static ServiceLocator manServiceLocator;
/**
* Construct a new remote command object. The command and arguments
* are supplied later using the execute method in the superclass.
*/
public RemoteCommand() throws CommandException {
super();
}
/**
* Construct a new remote command object. The command and arguments
* are supplied later using the execute method in the superclass.
*/
public RemoteCommand(String name, ProgramOptions po, Environment env)
throws CommandException {
super(name, po, env);
}
/**
* Construct a new remote command object. The command and arguments
* are supplied later using the execute method in the superclass.
* This variant is used by the RemoteDeploymentFacility class to
* control and capture the output.
*/
public RemoteCommand(String name, ProgramOptions po, Environment env,
String responseFormatType, OutputStream userOut)
throws CommandException {
this(name, po, env);
this.responseFormatType = responseFormatType;
this.userOut = userOut;
}
/** Helper for situation, where {@code CommandModel} is from cache and
* something shows, that server side signature of command was changed
*/
private void reExecuteAfterMetadataUpdate() throws ReExecuted, CommandException {
//Check CommandModel
if (rac == null) {
return;
}
if (rac.getCommandModel() == null) {
return;
}
if (!rac.isCommandModelFromCache()) {
return;
}
//Refetch command model
String eTag = CachedCommandModel.computeETag(rac.getCommandModel());
rac = null;
initializeRemoteAdminCommand();
rac.fetchCommandModel();
String newETag = CachedCommandModel.computeETag(rac.getCommandModel());
if (eTag != null && eTag.equals(newETag)) {
return; //Nothing change in command model
}
logger.log(Level.WARNING,
"Command signature of {0} command was changed. " +
"Reexecuting with new metadata.", name);
//clean state of this instance
this.options = null;
this.operands = null;
//Reexecute it
int result = execute(argv);
throw new ReExecuted(result);
}
@Override
public int execute(String... argv) throws CommandException {
try {
return super.execute(argv);
} catch (ReExecuted reex) {
return reex.getExecutionResult();
}
}
/**
* Set the directory in which any returned files will be stored.
* The default is the user's home directory.
*/
public void setFileOutputDirectory(File dir) {
outputDir = dir;
}
@Override
protected void prepare()
throws CommandException, CommandValidationException {
try {
processProgramOptions();
initializeAuth();
/*
* Now we have all the information we need to create
* the remote admin command object.
*/
initializeRemoteAdminCommand();
if (responseFormatType != null) {
rac.setResponseFormatType(responseFormatType);
}
if (userOut != null) {
rac.setUserOut(userOut);
}
/*
* Initialize a CookieManager so that we can retreive
* any cookies included in the reply. These cookies
* (e.g. JSESSIONID, JROUTE) are used for CLI session
* based routing.
*/
initializeCookieManager();
/*
* If this is a help request, we don't need the command
* metadata and we throw away all the other options and
* fake everything else.
*/
if (programOpts.isHelp()) {
commandModel = helpModel();
rac.setCommandModel(commandModel);
return;
}
/*
* Find the metadata for the command.
*/
commandModel = rac.getCommandModel();
if (programOpts.isNotifyCommand()) {
commandModel.add(new ParamModelData("notify", boolean.class, true, "false"));
}
} catch (CommandException cex) {
if (logger.isLoggable(Level.FINER))
logger.finer("RemoteCommand.prepare throws " + cex);
throw cex;
} catch (Exception e) {
if (logger.isLoggable(Level.FINER))
logger.finer("RemoteCommand.prepare throws " + e);
throw new CommandException(e.getMessage());
}
}
@Override
protected void prevalidate() throws CommandException {
try {
super.prevalidate();
} catch (CommandException ex) {
reExecuteAfterMetadataUpdate();
throw ex;
}
}
/**
* If it's a help request, don't prompt for any missing options.
*/
@Override
protected void validate()
throws CommandException, CommandValidationException {
if (programOpts.isHelp()) {
return;
}
try {
super.validate();
} catch (CommandValidationException ex) {
reExecuteAfterMetadataUpdate();
throw ex;
}
}
@Override
protected void inject() throws CommandException {
try {
super.prevalidate();
} catch (CommandValidationException ex) {
reExecuteAfterMetadataUpdate();
throw ex;
}
}
/**
* We do all our help processing in executeCommand.
*/
@Override
protected boolean checkHelp()
throws CommandException, CommandValidationException {
return false;
}
/**
* Runs the command using the specified arguments.
*/
@Override
protected int executeCommand()
throws CommandException, CommandValidationException {
try {
options.set("DEFAULT", operands);
output = rac.executeCommand(options);
if (returnAttributes)
attrs = rac.getAttributes();
else if (!returnOutput) {
if (output.length() > 0) {
logger.info(output);
}
}
} catch (CommandValidationException cve) {
reExecuteAfterMetadataUpdate();
throw cve;
} catch (CommandException ex) {
// if a --help request failed, try to emulate it locally
if (programOpts.isHelp()) {
Reader r = getLocalManPage();
BufferedReader br = null;
try {
if (r != null) {
br = new BufferedReader(r);
PrintWriter pw = new PrintWriter(System.out);
char[] buf = new char[8192];
int cnt;
while ((cnt = br.read(buf)) > 0)
pw.write(buf, 0, cnt);
pw.flush();
return SUCCESS;
}
} catch (IOException ioex2) {
// ignore it and throw original exception
} finally {
try {
if (br != null)
br.close();
} catch (IOException ioex3) {
// ignore it
}
}
}
throw ex;
}
final Map racAttrs = rac.getAttributes();
String returnVal = racAttrs != null ? racAttrs.get("exit-code") : null;
if(returnVal != null && "WARNING".equals(returnVal))
return WARNING;
return SUCCESS;
}
/**
* Execute the command and return the output as a string
* instead of writing it out.
*/
public String executeAndReturnOutput(String... args)
throws CommandException, CommandValidationException {
/*
* Tell the low level output processing to just save the output
* string instead of writing it out. Yes, this is pretty gross.
*/
returnOutput = true;
execute(args);
returnOutput = false;
return output;
}
/**
* Execute the command and return the main attributes from the manifest
* instead of writing out the output.
*/
public Map executeAndReturnAttributes(String... args)
throws CommandException, CommandValidationException {
/*
* Tell the low level output processing to just save the attributes
* instead of writing out the output. Yes, this is pretty gross.
*/
returnAttributes = true;
execute(args);
returnAttributes = false;
return attrs;
}
/**
* Get the usage text.
* If we got usage information from the server, use it.
*
* @return usage text
*/
@Override
public String getUsage() {
if (usage == null) {
if (rac == null) {
/*
* We weren't able to initialize the RemoteAdminCommand
* object, probably because we failed to parse the program
* options. With no ability to contact the remote server,
* we can't provide any command-specific usage information.
* Sigh.
*/
return getCommandUsage();
}
usage = rac.getUsage();
}
if (usage == null)
return super.getUsage();
StringBuilder usageText = new StringBuilder();
usageText.append(strings.get("Usage", getBriefCommandUsage()));
usageText.append(" ");
usageText.append(usage);
return usageText.toString();
}
/**
* Get the man page from the server. If the man page isn't
* available, e.g., because the server is down, try to find
* it locally by looking in the modules directory.
*/
public BufferedReader getManPage() {
try {
initializeRemoteAdminCommand();
rac.setCommandModel(helpModel());
ParameterMap params = new ParameterMap();
params.set("help", "true");
String manpage = rac.executeCommand(params);
return new BufferedReader(new StringReader(manpage));
} catch (CommandException cex) {
// ignore
}
/*
* Can't find the man page remotely, try to find it locally.
* XXX - maybe should only do this on connection failure
*/
BufferedReader r = getLocalManPage();
return r != null ? r : super.getManPage();
}
/**
* Return a CommandModel that only includes the --help option.
*/
private CommandModel helpModel() {
CommandModelData cm = new CommandModelData(name);
cm.add(new ParamModelData("help", boolean.class, true, "false", "?"));
return cm;
}
/**
* Try to find a local version of the man page for this command.
*/
private BufferedReader getLocalManPage() {
logger.fine(strings.get("NoRemoteManPage"));
String cmdClass = getCommandClass(getName());
ClassLoader mcl = getModuleClassLoader();
if (cmdClass != null && mcl != null) {
return ManPageFinder.getCommandManPage(getName(), cmdClass,
Locale.getDefault(), mcl, logger);
}
return null;
}
private void initializeRemoteAdminCommand() throws CommandException {
if (rac == null) {
rac = new CLIRemoteAdminCommand(name,
programOpts.getHost(), programOpts.getPort(),
programOpts.isSecure(), programOpts.getUser(),
programOpts.getPassword(), logger, programOpts.getAuthToken());
rac.setFileOutputDirectory(outputDir);
rac.setInteractive(programOpts.isInteractive());
}
}
private void initializeAuth() throws CommandException {
LoginInfo li = null;
try {
LoginInfoStore store = LoginInfoStoreFactory.getDefaultStore();
li = store.read(programOpts.getHost(), programOpts.getPort());
if (li == null)
return;
} catch (StoreException se) {
logger.finer(
"Login info could not be read from ~/.asadminpass file");
return;
}
/*
* If we don't have a user name, initialize it from .asadminpass.
* In that case, also initialize the password unless it was
* already specified (overriding what's in .asadminpass).
*
* If we already have a user name, and it's the same as what's
* in .asadminpass, and we don't have a password, use the password
* from .asadminpass.
*/
if (programOpts.getUser() == null) {
// not on command line and in .asadminpass
if (logger.isLoggable(Level.FINER))
logger.finer("Getting user name from ~/.asadminpass: " +
li.getUser());
programOpts.setUser(li.getUser());
if (programOpts.getPassword() == null) {
// not in passwordfile and in .asadminpass
logger.finer("Getting password from ~/.asadminpass");
programOpts.setPassword(li.getPassword(),
ProgramOptions.PasswordLocation.LOGIN_FILE);
}
} else if (programOpts.getUser().equals(li.getUser())) {
if (programOpts.getPassword() == null) {
// not in passwordfile and in .asadminpass
logger.finer("Getting password from ~/.asadminpass");
programOpts.setPassword(li.getPassword(),
ProgramOptions.PasswordLocation.LOGIN_FILE);
}
}
}
/*
* Initialize a CookieManager so that we can retreive
* any cookies included in the reply. These cookies
* (e.g. JSESSIONID, JROUTE) are used for CLI session
* based routing.
*/
private void initializeCookieManager() {
CookieStore defaultCookieStore = new CookieManager().getCookieStore();
CookieManager manager = new CookieManager(defaultCookieStore,
CookiePolicy.ACCEPT_ALL);
CookieHandler.setDefault(manager);
}
/**
* Given a command name, return the name of the class that implements
* that command in the server.
*/
private static String getCommandClass(String cmdName) {
ServiceLocator h = getManHabitat();
String cname = "org.glassfish.api.admin.AdminCommand";
for (ActiveDescriptor ad : h.getDescriptors(BuilderHelper.createContractFilter(cname))) {
if (ad.getName() != null && ad.getName().equals(cmdName)) {
return ad.getImplementation();
}
}
return null;
}
/**
* Return a ServiceLocator used just for reading man pages from the
* modules in the modules directory.
*/
private static synchronized ServiceLocator getManHabitat() {
if (manServiceLocator != null)
return manServiceLocator;
ModulesRegistry registry = new StaticModulesRegistry(getModuleClassLoader());
ServiceLocator serviceLocator = registry.createServiceLocator("default");
manServiceLocator = serviceLocator;
return manServiceLocator;
}
/**
* Return a ClassLoader that loads classes from all the modules
* (jar files) in the /modules directory.
*/
private static synchronized ClassLoader getModuleClassLoader() {
if (moduleClassLoader != null)
return moduleClassLoader;
try {
File installDir = new File(System.getProperty(
SystemPropertyConstants.INSTALL_ROOT_PROPERTY));
File modulesDir = new File(installDir, "modules");
moduleClassLoader = new DirectoryClassLoader(modulesDir,
CLICommand.class.getClassLoader());
return moduleClassLoader;
} catch (IOException ioex) {
return null;
}
}
}