com.marklogic.client.example.cookbook.DocumentOutputStream Maven / Gradle / Ivy

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/*
 * Copyright 2012-2016 MarkLogic Corporation
 *
 * 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.marklogic.client.example.cookbook;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import com.marklogic.client.DatabaseClient;
import com.marklogic.client.DatabaseClientFactory;
import com.marklogic.client.document.XMLDocumentManager;
import com.marklogic.client.example.cookbook.Util.ExampleProperties;
import com.marklogic.client.io.OutputStreamHandle;
import com.marklogic.client.io.OutputStreamSender;

/**
 * DocumentOutputStream illustrates how to write content to a document
 * using an OutputStream.  You provide the content during execution of
 * the write operation instead of when starting the write operation.
 */
public class DocumentOutputStream {
	public static void main(String[] args) throws IOException {
		run(Util.loadProperties());
	}

	public static void run(ExampleProperties props) throws IOException {
		System.out.println("example: "+DocumentOutputStream.class.getName());

		final int    MAX_BUF  = 8192;
		final String FILENAME = "flipper.xml";

		// create the client
		DatabaseClient client = DatabaseClientFactory.newClient(
				props.host, props.port, props.writerUser, props.writerPassword,
				props.authType);

		// create a manager for XML documents
		XMLDocumentManager docMgr = client.newXMLDocumentManager();

		// create an identifier for the document
		String docId = "/example/"+FILENAME;

		// create an anonymous class with a callback method
		OutputStreamSender sender = new OutputStreamSender() {
            // the callback receives the output stream
			public void write(OutputStream out) throws IOException {
        		// acquire the content
				InputStream docStream = Util.openStream(
						"data"+File.separator+FILENAME);
        		if (docStream == null)
        			throw new IOException("Could not read document example");

        		// copy content to the output stream
        		byte[] buf = new byte[MAX_BUF];
        		int byteCount = 0;
        		while ((byteCount=docStream.read(buf)) != -1) {
        			out.write(buf, 0, byteCount);
        		}
            }
        };

        // create a handle for writing the content
		OutputStreamHandle handle = new OutputStreamHandle(sender);

		// write the document content
		docMgr.write(docId, handle);

		System.out.println("Wrote /example/"+FILENAME+" content");

		tearDownExample(docMgr, docId);

		// release the client
		client.release();
	}

	// clean up by deleting the document that the example wrote
	public static void tearDownExample(XMLDocumentManager docMgr, String docId) {
		docMgr.delete(docId);
	}
}