com.cafeform.iumfs.twitterfs.files.PostFile.java Source code

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Here is the source code for com.cafeform.iumfs.twitterfs.files.PostFile.java

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/*
 * Copyright 2010 Kazuyoshi Aizawa
 *
 * 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 com.cafeform.iumfs.twitterfs.files;

import com.cafeform.iumfs.IumfsFile;
import com.cafeform.iumfs.NotADirectoryException;
import com.cafeform.iumfs.twitterfs.Account;
import com.cafeform.iumfs.twitterfs.TwitterFactoryAdapter;
import com.cafeform.iumfs.twitterfs.MessageSeparator;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Date;
import twitter4j.Status;
import twitter4j.Twitter;
import twitter4j.TwitterException;
import static java.util.logging.Level.*;
import java.util.logging.Logger;

public class PostFile extends TwitterFsFileImpl {
    private static final Logger logger = Logger.getLogger(PostFile.class.getName());

    protected static final int MAX_LENGTH = 140;
    private String prefix;

    public PostFile(Account account, String pathname) {
        this(account, pathname, "");
    }

    public PostFile(Account account, String pathname, String prefix) {
        super(account, pathname);
        this.prefix = prefix;
    }

    @Override
    public long getPermission() {
        return (long) 0100666; // can write
    }

    @Override
    public long read(ByteBuffer buf, long size, long offset) {
        /* Nothing can be read from this file. */
        return 0;
    }

    @Override
    public long write(byte[] buf, long size, long offset) throws FileNotFoundException, IOException {
        try {
            Status status = null;
            Twitter twitter = TwitterFactoryAdapter.getInstance(getUsername());

            /*
             * Get a strings written as a file data.
             */
            String wholeMessage = new String(buf);
            logger.log(FINER, getUserAndName() + " Orig Text:" + wholeMessage);
            logger.log(FINEST, getUserAndName() + " whole_msg.length() = " + wholeMessage.length());
            int left = wholeMessage.length();
            /*
             * Post strings to twitter every 140 characters.
             */
            MessageSeparator sep = new MessageSeparator(wholeMessage, prefix);
            while (sep.hasNext()) {
                String msg = (String) sep.next();

                status = twitter.updateStatus(msg);
                logger.log(FINEST, getUserAndName() + " Text: " + msg);
                logger.log(FINE, getUserAndName() + "Status updated");
            }
            Date now = new Date();
            setAtime(now.getTime());
            setMtime(now.getTime());
            setCtime(now.getTime());
            return 0;
        } catch (TwitterException ex) {
            switch (ex.getErrorCode()) {
            case 185: // User is over daily status update limit.
            case 187: // Status is a duplicate. Have written already.                                        
                logger.log(INFO, getUserAndName() + " Failed to post. " + ex.getErrorMessage());
                break;
            default:
                logger.log(SEVERE, getUserAndName() + " Failed to post.", ex);
            }
            // We need to return 0 (= means success) even in this situaion.
            // Otherwise kernel module continually send write request.
            return 0;
        }
    }

    @Override
    public void addFile(IumfsFile file) throws NotADirectoryException {
        throw new NotADirectoryException();
    }

    @Override
    public IumfsFile[] listFiles() {
        throw new NotADirectoryException();
    }
}