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Serves and publishes resources from war files or svn directories.

There is a newer version: 2.11.1

/**
 * Copyright 1&1 Internet AG, https://github.com/1and1/
 *
 * 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.
 */
package net.oneandone.lavender.config;

import net.oneandone.sushi.fs.Node;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;

/** Node and optionally lock on a host. */
public class Connection implements AutoCloseable {
    private static final Logger LOG = LoggerFactory.getLogger(Connection.class);

    public static Connection openLocked(Host host, Node root, String lockPath, String lockContent, int wait) throws IOException {
        Node lockfile;
        int seconds;

        lockfile = root.join(lockPath);
        seconds = 0;
        while (true) {
            try {
                lockfile.mkfile();
                break;
            } catch (IOException e) {
                if (seconds >= wait) {
                    throw e;
                }
                if (seconds % 10 == 0) {
                    LOG.info("waiting for lock " + lockfile + ", seconds=" + seconds);
                }
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e1) {
                    // fall-through
                }
                seconds++;
            }
        }
        lockfile.writeString(lockContent);
        return new Connection(host, root, lockfile);
    }

    public static Connection openSimple(Host host, Node root) {
        return new Connection(host, root, null);
    }

    //--

    private final Host host;
    private final Node root;
    private final Node lock;

    public Connection(Host host, Node root, Node lock) {
        this.host = host;
        this.root = root;
        this.lock = lock;
    }

    public Host getHost() {
        return host;
    }

    public Node join(String ... names) {
        return root.join(names);
    }

    public void close() throws IOException {
        if (lock != null) {
            lock.deleteFile();
        }
    }
}