com.anrisoftware.globalpom.fileresourcemanager.FileResourceManagerProvider Maven / Gradle / Ivy

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Saves and loads resources to files in atomic access.
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/*
 * Copyright 2013-2025 Erwin Müller 
 *
 * 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.anrisoftware.globalpom.fileresourcemanager;


import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.nio.file.Files;

import jakarta.inject.Inject;

import org.apache.commons.transaction.file.FileResourceManager;
import org.apache.commons.transaction.util.LoggerFacade;
import org.apache.commons.transaction.util.PrintWriterLogger;

import com.google.inject.Provider;

/**
 * Provides the file resource manager for ACID file operations. The store
 * directory must be set before creating the manager.
 *
 * @author Erwin Mueller, [email protected]
 * @since 1.8
 */
public class FileResourceManagerProvider implements Provider {

    @Inject
    private FileResourceManagerProviderLogger log;

    private String storeDir;

    private boolean debug;

    /**
     * Sets debug enabled for the file resource manager.
     *
     * @param debug set to {@code true} to enable debug before creating the manager.
     */
    public void setDebug(boolean debug) {
        this.debug = debug;
    }

    /**
     * Sets the store directory path for the file resource manager.
     *
     * @param path the store directory {@link File} path.
     */
    public void setStoreDir(File path) {
        setStoreDir(path.getAbsolutePath());
    }

    /**
     * Sets the store directory path for the file resource manager.
     *
     * @param path the store directory path.
     */
    public void setStoreDir(String path) {
        this.storeDir = path;
    }

    @Override
    public FileResourceManager get() {
        String workDir = createTmpDir();
        boolean urlEncodePath = false;
        final ByteArrayOutputStream stream = new ByteArrayOutputStream(1024);
        PrintWriter printWriter = new PrintWriter(stream) {
            @Override
            public void flush() {
                super.flush();
                log.logFileResourceMessage(stream.toString());
            }
        };
        LoggerFacade logger = new PrintWriterLogger(printWriter, "", debug);
        return new FileResourceManager(storeDir, workDir, urlEncodePath, logger);
    }

    private String createTmpDir() {
        try {
            File tmp = Files.createTempDirectory("fileresourcemanager").toFile();
            String workDir = tmp.getAbsolutePath();
            return workDir;
        } catch (IOException e) {
            throw log.errorCreateWorkDir(e);
        }
    }

}