org.apache.jackrabbit.vault.util.console.Console Maven / Gradle / Ivy
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Provides a simple shell-like console that access the file vault.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.jackrabbit.vault.util.console;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.jackrabbit.vault.util.console.util.Table;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import jline.Completor;
import jline.ConsoleReader;
import jline.History;
import jline.SimpleCompletor;
/**
* Console...
*/
public class Console {
/**
* the default logger
*/
static final Logger log = LoggerFactory.getLogger(Console.class);
private ConsoleExecutionContext currentCtx;
private final Map contexts = new HashMap();
private final AbstractApplication app;
private ConsoleReader reader;
/**
* indicates console is running
*/
private boolean running = false;
public Console(AbstractApplication app) {
this.app = app;
}
public void addContext(ConsoleExecutionContext ctx) {
if (contexts.containsKey(ctx.getName())) {
throw new IllegalArgumentException("Context with name '" + ctx.getName() + "' already registered.");
}
contexts.put(ctx.getName(), ctx);
ctx.attach(this);
currentCtx = ctx;
}
public void removeContext(ConsoleExecutionContext ctx) {
contexts.remove(ctx.getName());
}
public void switchContext(ConsoleExecutionContext ctx) {
if (!contexts.containsValue(ctx)) {
throw new IllegalArgumentException("Context not installed: " + ctx.getName());
}
switchContext(ctx.getName());
}
private void setCompletor() {
// always remove existing
Iterator iter = reader.getCompletors().iterator();
while (iter.hasNext()) {
reader.removeCompletor((Completor) iter.next());
iter = reader.getCompletors().iterator();
}
Set triggers = currentCtx.getCommandsGroup().getTriggers();
reader.addCompletor(new SimpleCompletor((String[]) triggers.toArray(new String[triggers.size()])));
}
public void switchContext(String name) {
if (name == null) {
Iterator iter = contexts.keySet().iterator();
Table t = new Table(2);
while (iter.hasNext()) {
name = (String) iter.next();
ConsoleExecutionContext c = (ConsoleExecutionContext) contexts.get(name);
if (c == currentCtx) {
name = "*" + name;
} else {
name = " " + name;
}
String path = c.getProperty(AbstractApplication.KEY_PATH);
t.addRow(name, path);
}
t.print();
} else {
if (!contexts.containsKey(name)) {
throw new ExecutionException("No such context: " + name);
}
currentCtx = (ConsoleExecutionContext) contexts.get(name);
setCompletor();
log.info("Switched to context '{}'", name);
}
}
protected void setup() {
}
protected AbstractApplication getApplication() {
return app;
}
protected void initJLine() {
History history = new History();
/*
try {
history = new History(new File(".consolehistory"));
} catch (IOException e) {
log.warn("Cannot read or write file for storing command line history: " + e.getMessage() + "");
history = new History();
}
*/
reader.setHistory(history);
reader.setUseHistory(true);
setCompletor();
}
public void run() throws IOException {
reader = new ConsoleReader();
initJLine();
// setup and start
setup();
running = true;
while (running) {
try {
String line = reader.readLine(getPrompt());
if (line == null) {
running = false;
} else {
line = line.trim();
if (line.length() > 0) {
if (line.startsWith("!")) {
// re-execute event from history
String oldLine;
try {
int historyIndex = Integer.valueOf(line.substring(1).trim()).intValue();
oldLine = (String) reader.getHistory().getHistoryList().get(historyIndex - 1);
} catch (Exception e) {
System.out.println(" " + line + ": event not found");
continue;
}
reader.getHistory().addToHistory(oldLine);
System.out.println("Executing '" + oldLine + "'");
line = oldLine;
}
long now = System.currentTimeMillis();
currentCtx.execute(line);
long time = System.currentTimeMillis() - now;
System.out.println("Command completed in " + time + "ms");
}
}
} catch (Exception e) {
log.error("There was a unexpected problem while processing the line.", e);
}
}
close();
}
public ConsoleReader getReader() {
return reader;
}
public boolean isRunning() {
return running;
}
public void quit() {
running = false;
}
private String getPrompt() {
String p = app.getProperty(AbstractApplication.KEY_PROMPT);
StringBuffer out = new StringBuffer();
for (int i = 0; i < p.length(); i++) {
char c = p.charAt(i);
if (c == '$') {
c = p.charAt(++i);
if (c == '{') {
int j = p.indexOf('}', i);
String key = p.substring(i + 1, j);
String prop = currentCtx.getProperty(key);
if (prop != null && prop.length() > 40) {
prop = "..." + prop.substring(prop.length() - 37);
}
out.append(prop);
i = j;
} else {
out.append('$');
out.append(c);
}
} else {
out.append(c);
}
}
return out.toString();
}
protected boolean close() {
return true;
}
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