NodeJsDebuggerFactory.java

/*******************************************************************************
 * Copyright (c) 2012-2017 Codenvy, S.A.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Codenvy, S.A. - initial API and implementation
 *******************************************************************************/
package org.eclipse.che.plugin.nodejsdbg.server;

import org.eclipse.che.api.debugger.server.Debugger;
import org.eclipse.che.api.debugger.server.DebuggerFactory;
import org.eclipse.che.api.debugger.server.exceptions.DebuggerException;

import java.net.URI;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Map;

import static com.google.common.base.Strings.isNullOrEmpty;
import static java.util.stream.Collectors.toMap;

/**
 * Factory to create nodejs debugger instance.
 * Allowed the following connection properties:
 *
 * uri - connects to the process via the URI such as localhost:5858
 * pid - connects to the process via the pid
 * script - entrypoint to start debugger
 *
 * @author Anatoliy Bazko
 */
public class NodeJsDebuggerFactory implements DebuggerFactory {
    private static final String TYPE = "nodejsdbg";

    @Override
    public String getType() {
        return TYPE;
    }

    @Override
    public Debugger create(Map<String, String> properties, Debugger.DebuggerCallback debuggerCallback) throws DebuggerException {
        Map<String, String> normalizedProps = properties.entrySet()
                                                        .stream()
                                                        .collect(toMap(e -> e.getKey().toLowerCase(), Map.Entry::getValue));


        Integer pid = null;
        URI uri = null;

        String pidStr = normalizedProps.get("pid");
        if (!isNullOrEmpty(pidStr)) {
            try {
                pid = Integer.valueOf(pidStr);
            } catch (NumberFormatException e) {
                throw new DebuggerException(String.format("Illegal 'pid' format %s. Debugger can't be started.", pidStr));
            }
        }

        String uriStr = normalizedProps.get("uri");
        if (!isNullOrEmpty(uriStr)) {
            try {
                uri = URI.create(uriStr);
            } catch (IllegalArgumentException e) {
                throw new DebuggerException(String.format("Illegal 'uri' format %s. Debugger can't be started.", uriStr));
            }
        }

        String script = normalizedProps.get("script");
        if (!isNullOrEmpty(script) && !Files.exists(Paths.get(script))) {
            throw new DebuggerException(String.format("Script '%s' to debug not found. Debugger can't be started.", script));
        }

        if (isNullOrEmpty(pidStr) && isNullOrEmpty(uriStr) && isNullOrEmpty(script)) {
            throw new DebuggerException("Unrecognized debug connection options. Allowed only: pid, uri or script.");
        }

        return NodeJsDebugger.newInstance(pid, uri, script, debuggerCallback);
    }
}