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package net.apexes.wsonrpc.server.nano.http.tempfiles;

/*
 * #%L
 * NanoHttpd-Core
 * %%
 * Copyright (C) 2012 - 2016 nanohttpd
 * %%
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the nanohttpd nor the names of its contributors
 *    may be used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * #L%
 */

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;

import net.apexes.wsonrpc.server.nano.http.NanoHTTPD;

/**
 * Default strategy for creating and cleaning up temporary files.
 * 
 * 

 * This class stores its files in the standard location (that is, wherever
 * java.io.tmpdir points to). Files are added to an internal list,
 * and deleted when no longer needed (that is, when clear() is
 * invoked at the end of processing a request).
 * 
 */
public class DefaultTempFileManager implements ITempFileManager {

    private final File tmpdir;

    private final List tempFiles;

    public DefaultTempFileManager() {
        this.tmpdir = new File(System.getProperty("java.io.tmpdir"));
        if (!tmpdir.exists()) {
            tmpdir.mkdirs();
        }
        this.tempFiles = new ArrayList();
    }

    @Override
    public void clear() {
        for (ITempFile file : this.tempFiles) {
            try {
                file.delete();
            } catch (Exception ignored) {
                NanoHTTPD.LOG.log(Level.WARNING, "could not delete file ", ignored);
            }
        }
        this.tempFiles.clear();
    }

    @Override
    public ITempFile createTempFile(String filename_hint) throws Exception {
        DefaultTempFile tempFile = new DefaultTempFile(this.tmpdir);
        this.tempFiles.add(tempFile);
        return tempFile;
    }
}