org.apache.nifi.minifi.c2.cache.s3.S3WritableConfiguration.java Source code

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Here is the source code for org.apache.nifi.minifi.c2.cache.s3.S3WritableConfiguration.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.nifi.minifi.c2.cache.s3;

import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.model.S3Object;
import com.amazonaws.services.s3.model.S3ObjectSummary;

import java.io.InputStream;
import java.io.OutputStream;

import org.apache.nifi.minifi.c2.api.ConfigurationProviderException;
import org.apache.nifi.minifi.c2.api.cache.WriteableConfiguration;

public class S3WritableConfiguration implements WriteableConfiguration {

    private AmazonS3 s3;
    private final S3Object s3Object;
    private final String version;

    /**
     * Creates a new S3 writable configuration.
     * @param s3 An S3 {@link AmazonS3 client}.
     * @param s3ObjectSummary The S3 object {@link S3ObjectSummary summary}.
     * @param version The version of the configuration.
     */
    public S3WritableConfiguration(AmazonS3 s3, S3ObjectSummary s3ObjectSummary, String version) {

        this.s3 = s3;
        this.s3Object = s3.getObject(s3ObjectSummary.getBucketName(), s3ObjectSummary.getKey());
        this.version = version;

    }

    /**
     * Creates a new S3 writable configuration.
     * @param s3 An S3 {@link AmazonS3 client}.
     * @param s3Object The S3 {@link S3Object object}.
     * @param version The version of the configuration.
     */
    public S3WritableConfiguration(AmazonS3 s3, S3Object s3Object, String version) {

        this.s3 = s3;
        this.s3Object = s3Object;
        this.version = version;

    }

    @Override
    public String getVersion() {
        return version;
    }

    @Override
    public boolean exists() {
        return s3.doesObjectExist(s3Object.getBucketName(), s3Object.getKey());
    }

    @Override
    public OutputStream getOutputStream() throws ConfigurationProviderException {
        return new S3OutputStream(s3Object.getBucketName(), s3Object.getKey(), s3);
    }

    @Override
    public InputStream getInputStream() throws ConfigurationProviderException {
        return s3Object.getObjectContent();
    }

    @Override
    public String getName() {
        return s3Object.getKey();
    }

    @Override
    public String toString() {
        return "FileSystemWritableConfiguration{objectKey=" + s3Object.getKey() + ", version='" + version + "'}";
    }

}