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package org.jolokia.jvmagent.client.util;
/*
* Copyright 2009-2013 Roland Huss
*
* 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.
*/
import java.io.File;
import java.net.URISyntaxException;
import java.util.*;
import java.util.regex.*;
import org.jolokia.config.ConfigKey;
import org.jolokia.util.EscapeUtil;
/**
* Class representing options and arguments known to the client launcher. It also knows how
* to parse the command line.
*
* @author roland
* @since 12.08.11
*/
@SuppressWarnings("PMD.AvoidDuplicateLiterals")
public final class OptionsAndArgs {
// ===================================================================================
// Available options
private static final Map SHORT_OPTS = new HashMap();
private static final Set OPTIONS = new HashSet(Arrays.asList(
// JVM Agent options:
"host", "port", "agentContext", "user", "password",
"quiet!", "verbose!", "version!", "executor", "threadNr",
"backlog", "hide!", "protocol","authMode","authClass",
"authUrl", "authPrincipalSpec", "authIgnoreCerts!",
//https options:
"keystore", "keystorePassword", "useSslClientAuthentication!",
"secureSocketProtocol", "keyStoreType", "keyManagerAlgorithm", "trustManagerAlgorithm",
"caCert", "serverCert", "serverKey", "serverKeyAlgorithm", "clientPrincipal", "extractClientCheck",
"sslProtocol", "sslCipherSuite",
// Jolokia options:
"historyMaxEntries", "debug!", "debugMaxEntries",
"logHandlerClass", "dispatcherClasses", "maxDepth", "maxCollectionSize",
"maxObjects", "restrictorClass", "policyLocation", "mbeanQualifier",
"canonicalNaming", "includeStackTrace", "serializeException",
"discoveryEnabled", "discoveryAgentUrl", "agentId", "agentDescription",
// Others:
"config", "help!"));
private static final Set LIST_OPTIONS = new HashSet(Arrays.asList(
"clientPrincipal", "sslProtocol", "sslCipherSuite"));
static {
String shortOptsDef[] = {
"h", "help",
"u", "user",
"p", "password",
"c", "agentContext",
"v", "verbose",
"q", "quiet"
};
for (int i = 0; i < shortOptsDef.length; i += 2) {
SHORT_OPTS.put(shortOptsDef[i],shortOptsDef[i+1]);
}
}
// Command which require a PID as argument
private static final Set COMMANDS_REQUIRING_PID =
new HashSet(Arrays.asList("start","stop","toggle","status"));
// Launcher command
private String command;
// Extra arguments
private List extraArgs;
private Map options;
private boolean quiet;
private boolean verbose;
// Jar file where this class is in
private File jarFile;
/**
* Parse a list of arguments. Options start with '--' (long form) or '-' (short form) and are
* defined in {@see OPTIONS} and {@see SHORT_OPTS}. For options with arguments, the argument can
* bei either provided in the form '--option=value' or '--option value'. Everything which is
* not an option is considered to be an argument. Two arguments are allowed: The command
* (first) and the PID (second). Any non numeric PID is considered to be a pattern. Either {@link #getPid()} or
* {@link #getProcessPattern()} is set.
*
* If no PID/pattern and no command is given the "list" command is implied. If as first argument a pure numeric value
* or a pattern (which must not be equal to a valid command) is given, then "toggle" is infered with the given
* PID/pattern.
*
* @param pCommands set of commands which are known
* @param pArgs arguments as given on the command line
* @throws IllegalArgumentException if parsing fails
*/
public OptionsAndArgs(Set pCommands, String ... pArgs) {
options = new HashMap();
// Parse options
List arguments = new ArrayList();
for (int i = 0; i < pArgs.length; i++) {
String arg = pArgs[i];
if (arg.startsWith("-")) {
ArgParsed argParsed = parseArgument(pArgs[i], i + 1 <= pArgs.length - 1 ? pArgs[i + 1] : null);
if (argParsed.skipNext) {
i++;
}
String optionsKey =
argParsed.option +
(LIST_OPTIONS.contains(argParsed.option) ? getNextListIndexSuffix(options, argParsed.option) : "");
options.put(optionsKey, argParsed.value);
} else {
arguments.add(arg);
}
}
command = arguments.size() > 0 ? arguments.remove(0) : null;
String[] args = arguments.size() > 0 ? arguments.toArray(new String[0]) : new String[0];
init(pCommands, args);
}
/**
* Convert options to agent readable options (i.e. a single string with options separated by commas)
*
* @return agent string
*/
public String toAgentArg() {
StringBuilder arg = new StringBuilder();
for (Map.Entry entry : options.entrySet()) {
String key = entry.getKey();
if (!key.equals("quiet") && !key.equals("verbose")) {
arg.append(key).append("=").append(EscapeUtil.escape(entry.getValue(),EscapeUtil.CSV_ESCAPE,",")).append(",");
}
}
return arg.length() > 0 ? arg.substring(0,arg.length() - 1) : "";
}
/**
* Process id as given as argument (if any). If a pattern for matching the process name is used, this
* method returns null.
*
* @return process id or null
*/
public String getPid() {
String arg = extraArgs.size() > 0 ? extraArgs.get(0) : null;
return arg != null && arg.matches("^\\d+$") ? arg : null;
}
/**
* A pattern used for matching a process name. If {@link #getPid()} return a non-null value,
* this method returns always null
*
* @return pattern to match a process name or null
*/
public Pattern getProcessPattern() {
String arg = extraArgs.size() > 0 ? extraArgs.get(0) : null;
try {
return arg != null && getPid() == null ?
Pattern.compile(arg, Pattern.CASE_INSENSITIVE)
: null;
} catch (PatternSyntaxException exp) {
throw new IllegalArgumentException("Invalid pattern '" + arg + "' for matching process names", exp);
}
}
/**
* The command given as argument
*
* @return command
*/
public String getCommand() {
return command;
}
/**
* Get extra arguments in addition to the command, or an empty list
*/
public List getExtraArgs() {
return extraArgs;
}
/**
* Whether the program should be silent
* @return true if quiet mode is selected
*/
public boolean isQuiet() {
return quiet;
}
/**
* Get the configured port
*/
public String getPort() {
String port = options.get("port");
return port != null ? port : "8778";
}
/**
* Verbose output if this is true
*
* @return true if verbose output is requested
*/
public boolean isVerbose() {
return verbose;
}
/**
* Return true if this command required a attached VM or false otherwise
*
* @return true if the command requires an attached VM
*/
public boolean needsVm() {
return COMMANDS_REQUIRING_PID.contains(command) || "list".equals(command);
}
/**
* Path to this agents jar file
*
* @return full path to jar file
*/
public String getJarFilePath() {
return jarFile.getAbsolutePath();
}
/**
* Name of the agents jar file
*
* @return short name of jar file containing this agent.
*/
public String getJarFileName() {
return jarFile.getName();
}
/**
* Lookup the JAR File from where this class is loaded
*
* @return File pointing to the JAR-File from where this class was loaded.
*/
public static File lookupJarFile() {
try {
return new File(OptionsAndArgs.class
.getProtectionDomain()
.getCodeSource()
.getLocation()
.toURI());
} catch (URISyntaxException e) {
throw new IllegalStateException("Error: Cannot lookup jar for this class: " + e,e);
}
}
// ===============================================================
// Command line handling
private static final Pattern ARGUMENT_PATTERN_WITH_EQUAL = Pattern.compile("([^=]+)=(.*)");
private ArgParsed parseArgument(String pArg, String pNextArgument) {
return pArg.startsWith("--") ?
parseLongOption(pArg, pNextArgument) :
parseShortOption(pArg, pNextArgument);
}
private ArgParsed parseShortOption(String pArg, String pNextArgument) {
// Short option
String opt = pArg.substring(1);
String longOpt = SHORT_OPTS.get(opt);
if (longOpt == null) {
throw new IllegalArgumentException("No short option '" + opt + "' known");
}
return parseArgument("--" + longOpt,pNextArgument);
}
private ArgParsed parseLongOption(String pArg, String pNextArgument) {
// Long option
String opt = pArg.substring(2);
String value = null;
// Check for format 'key=value' as argument
Matcher matcher = ARGUMENT_PATTERN_WITH_EQUAL.matcher(opt);
if (matcher.matches()) {
opt = matcher.group(1);
value = matcher.group(2);
}
if (OPTIONS.contains(opt)) {
verifyOptionWithArgument(opt, value, pNextArgument);
return value != null ? new ArgParsed(opt, value, false) : new ArgParsed(opt,pNextArgument,true);
} else if (OPTIONS.contains(opt + "!")) {
return new ArgParsed(opt,"true",false);
} else {
throw new IllegalArgumentException("Unknown option '" + opt + "'");
}
}
// check for the next key with a suffix like ".1" which is not already set
private String getNextListIndexSuffix(Map options, String key) {
if (!options.containsKey(key)) {
return "";
} else {
int i = 1;
while (options.containsKey(key + "." + i)) {
i++;
}
return "." + i;
}
}
private void verifyOptionWithArgument(String pOpt, String pValue, String pNextArgument) {
// Option with argument
if (pValue == null && (pNextArgument == null || pNextArgument.startsWith("-"))) {
throw new IllegalArgumentException("Option '" + pOpt + "' requires an argument");
}
}
// Initialise default command and validate
private void init(Set pCommands, String ... pArgs) {
quiet = options.containsKey("quiet");
verbose = options.containsKey("verbose");
jarFile = lookupJarFile();
// Special cases first
extraArgs = checkCommandAndArgs(pCommands, pArgs);
}
private void verifyCommandAndArgs(String pCommand, List pArgs) {
if (COMMANDS_REQUIRING_PID.contains(pCommand) && pArgs.size() == 0) {
throw new IllegalArgumentException("No process id (PID) or pattern given");
};
}
private List checkCommandAndArgs(Set pCommands, String ... pArgs) {
List ret = new ArrayList(Arrays.asList(pArgs));
if (options.containsKey("help")) {
command = "help";
} else if (options.containsKey("version")) {
command = "version";
} else if (command != null && pArgs.length == 0 && !pCommands.contains(command)) {
ret.add(command);
command = "toggle";
} else if (command == null && pArgs.length == 0) {
command = "list";
}
verifyCommandAndArgs(command,ret);
return ret;
}
// A parsed argument
private static final class ArgParsed {
private boolean skipNext;
private String option;
private String value;
private ArgParsed(String pOption, String pValue, boolean pSkipNext) {
skipNext = pSkipNext;
option = pOption;
value = pValue;
}
}
}
