io.pivotal.poc.claimcheck.LocalFileClaimCheckStore.java Source code

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Here is the source code for io.pivotal.poc.claimcheck.LocalFileClaimCheckStore.java

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/*
 * Copyright 2016 the original author or authors.
 * 
 * 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 io.pivotal.poc.claimcheck;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.util.Assert;
import org.springframework.util.FileCopyUtils;
import org.springframework.util.IdGenerator;

/**
 * @author Mark Fisher
 */
public class LocalFileClaimCheckStore implements FileClaimCheckStore {

    private static final Logger log = LoggerFactory.getLogger(LocalFileClaimCheckStore.class);

    private final File directory;

    private final IdGenerator idGenerator;

    public LocalFileClaimCheckStore(File directory, IdGenerator idGenerator) {
        Assert.notNull(directory, "directory must not be null");
        Assert.notNull(idGenerator, "IdGenerator must not be null");
        if (directory.exists()) {
            Assert.isTrue(directory.isDirectory());
        } else {
            directory.mkdirs();
        }
        this.directory = directory;
        this.idGenerator = idGenerator;
    }

    @Override
    public Resource find(String id) {
        return new FileSystemResource(new File(this.directory, id));
    }

    @Override
    public String save(Resource resource) {
        String id = idGenerator.generateId().toString();
        try {
            File outputFile = new File(this.directory, id);
            FileCopyUtils.copy(new InputStreamReader(resource.getInputStream()), new FileWriter(outputFile));
            log.info("saved '{}' to {}", id, outputFile.getAbsolutePath());
        } catch (IOException e) {
            throw new IllegalStateException("failed to write file", e);
        }
        return id;
    }
}