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package org.apache.camel.component.file; |
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import org.apache.camel.Processor; |
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import org.apache.camel.impl.ScheduledPollConsumer; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import java.io.File; |
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import java.io.IOException; |
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import java.io.RandomAccessFile; |
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import java.nio.channels.FileChannel; |
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public class FileConsumer extends ScheduledPollConsumer<FileExchange> { |
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private static final transient Log log = LogFactory.getLog(FileConsumer.class); |
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private final FileEndpoint endpoint; |
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private boolean recursive = true; |
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private boolean attemptFileLock = false; |
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private String regexPattern = ""; |
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private long lastPollTime = 0l; |
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public FileConsumer(final FileEndpoint endpoint, Processor processor) { |
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super(endpoint, processor); |
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this.endpoint = endpoint; |
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} |
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protected void poll() throws Exception { |
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pollFileOrDirectory(endpoint.getFile(), isRecursive()); |
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lastPollTime = System.currentTimeMillis(); |
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} |
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protected void pollFileOrDirectory(File fileOrDirectory, boolean processDir) { |
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if (!fileOrDirectory.isDirectory()) { |
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pollFile(fileOrDirectory); |
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} |
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else if (processDir) { |
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log.debug("Polling directory " + fileOrDirectory); |
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File[] files = fileOrDirectory.listFiles(); |
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for (int i = 0; i < files.length; i++) { |
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pollFileOrDirectory(files[i], isRecursive()); |
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} |
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} |
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else { |
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log.debug("Skipping directory " + fileOrDirectory); |
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} |
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} |
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protected void pollFile(final File file) { |
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if (file.exists() && file.lastModified() > lastPollTime) { |
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if (isValidFile(file)) { |
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processFile(file); |
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} |
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} |
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} |
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protected void processFile(File file) { |
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try { |
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getProcessor().process(endpoint.createExchange(file)); |
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} catch (Throwable e) { |
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handleException(e); |
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} |
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} |
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protected boolean isValidFile(File file) { |
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boolean result = false; |
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if (file != null && file.exists()) { |
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if (isMatched(file)) { |
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if (isAttemptFileLock()) { |
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FileChannel fc = null; |
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try { |
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fc = new RandomAccessFile(file, "rw").getChannel(); |
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fc.lock(); |
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result = true; |
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} |
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catch (Throwable e) { |
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log.debug("Failed to get the lock on file: " + file, e); |
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} |
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finally { |
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if (fc != null) { |
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try { |
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fc.close(); |
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} |
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catch (IOException e) { |
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} |
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} |
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} |
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} |
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else { |
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result = true; |
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} |
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} |
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} |
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return result; |
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} |
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protected boolean isMatched(File file) { |
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boolean result = true; |
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if (regexPattern != null && regexPattern.length() > 0) { |
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result = file.getName().matches(getRegexPattern()); |
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} |
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return result; |
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} |
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public boolean isRecursive() { |
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return this.recursive; |
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} |
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public void setRecursive(boolean recursive) { |
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this.recursive = recursive; |
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} |
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public boolean isAttemptFileLock() { |
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return this.attemptFileLock; |
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} |
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public void setAttemptFileLock(boolean attemptFileLock) { |
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this.attemptFileLock = attemptFileLock; |
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} |
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public String getRegexPattern() { |
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return this.regexPattern; |
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} |
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public void setRegexPattern(String regexPattern) { |
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this.regexPattern = regexPattern; |
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} |
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} |