com.adaptris.core.lms.FilePurge.java Source code

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Here is the source code for com.adaptris.core.lms.FilePurge.java

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/*
 * Copyright 2015 Adaptris Ltd.
 * 
 * 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.adaptris.core.lms;

import java.io.File;
import java.io.FileFilter;
import java.util.Arrays;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.filefilter.RegexFileFilter;

import com.adaptris.core.fs.OlderThan;

public class FilePurge {
    private FileFilter fileFilter;

    private static final FilePurge purger = new FilePurge();
    private static final String PURGE_FILTER_NAME = "^" + FileBackedMessageFactory.TMP_FILE_PREFIX + ".*";
    private static final String PURGE_FILTER_AGE = "-PT30S";

    private FilePurge() {
        fileFilter = new TemporaryFileFilter();
    }

    public static FilePurge getInstance() {
        return purger;
    }

    public void purge() {
        try {
            File dir = new File(System.getProperty("java.io.tmpdir"));
            File[] files = dir.listFiles(fileFilter);
            for (File file : files) {
                FileUtils.deleteQuietly(file);
            }
        } catch (Exception ignoredIntentionally) {
            ;
        }
    }

    private class TemporaryFileFilter implements FileFilter {
        private List<FileFilter> filters = Arrays.asList(new RegexFileFilter(PURGE_FILTER_NAME),
                new OlderThan(PURGE_FILTER_AGE));

        @Override
        public boolean accept(File pathname) {
            int result = 0;
            for (FileFilter f : filters) {
                result += f.accept(pathname) ? 1 : 0;
            }
            return result == filters.size();
        }

    }
}