| /* |
| * 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.camel.component.mongodb.gridfs; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.Reader; |
| |
| import com.mongodb.BasicDBObject; |
| import com.mongodb.DBCursor; |
| import com.mongodb.DBObject; |
| import com.mongodb.gridfs.GridFSDBFile; |
| import com.mongodb.gridfs.GridFSInputFile; |
| import com.mongodb.util.JSON; |
| import org.apache.camel.Exchange; |
| import org.apache.camel.support.DefaultProducer; |
| |
| public class GridFsProducer extends DefaultProducer { |
| private GridFsEndpoint endpoint; |
| |
| public GridFsProducer(GridFsEndpoint endpoint) { |
| super(endpoint); |
| this.endpoint = endpoint; |
| } |
| |
| @Override |
| public void process(Exchange exchange) throws Exception { |
| String operation = endpoint.getOperation(); |
| if (operation == null) { |
| operation = exchange.getIn().getHeader(GridFsEndpoint.GRIDFS_OPERATION, String.class); |
| } |
| if (operation == null || "create".equals(operation)) { |
| final String filename = exchange.getIn().getHeader(Exchange.FILE_NAME, String.class); |
| Long chunkSize = exchange.getIn().getHeader(GridFsEndpoint.GRIDFS_CHUNKSIZE, Long.class); |
| |
| InputStream ins = exchange.getIn().getMandatoryBody(InputStream.class); |
| GridFSInputFile gfsFile = endpoint.getGridFs().createFile(ins, filename, true); |
| if (chunkSize != null && chunkSize > 0) { |
| gfsFile.setChunkSize(chunkSize); |
| } |
| final String ct = exchange.getIn().getHeader(Exchange.CONTENT_TYPE, String.class); |
| if (ct != null) { |
| gfsFile.setContentType(ct); |
| } |
| String metaData = exchange.getIn().getHeader(GridFsEndpoint.GRIDFS_METADATA, String.class); |
| DBObject dbObject = (DBObject) JSON.parse(metaData); |
| if (dbObject != null) { |
| gfsFile.setMetaData(dbObject); |
| } |
| gfsFile.save(); |
| //add headers with the id and file name produced by the driver. |
| exchange.getIn().setHeader(Exchange.FILE_NAME_PRODUCED, gfsFile.getFilename()); |
| exchange.getIn().setHeader(GridFsEndpoint.GRIDFS_FILE_ID_PRODUCED, gfsFile.getId()); |
| } else if ("remove".equals(operation)) { |
| final String filename = exchange.getIn().getHeader(Exchange.FILE_NAME, String.class); |
| endpoint.getGridFs().remove(filename); |
| } else if ("findOne".equals(operation)) { |
| final String filename = exchange.getIn().getHeader(Exchange.FILE_NAME, String.class); |
| GridFSDBFile file = endpoint.getGridFs().findOne(filename); |
| if (file != null) { |
| exchange.getIn().setHeader(GridFsEndpoint.GRIDFS_METADATA, JSON.serialize(file.getMetaData())); |
| exchange.getIn().setHeader(Exchange.FILE_CONTENT_TYPE, file.getContentType()); |
| exchange.getIn().setHeader(Exchange.FILE_LENGTH, file.getLength()); |
| exchange.getIn().setHeader(Exchange.FILE_LAST_MODIFIED, file.getUploadDate()); |
| exchange.getIn().setBody(file.getInputStream(), InputStream.class); |
| } else { |
| throw new FileNotFoundException("No GridFS file for " + filename); |
| } |
| } else if ("listAll".equals(operation)) { |
| final String filename = exchange.getIn().getHeader(Exchange.FILE_NAME, String.class); |
| DBCursor cursor; |
| if (filename == null) { |
| cursor = endpoint.getGridFs().getFileList(); |
| } else { |
| cursor = endpoint.getGridFs().getFileList(new BasicDBObject("filename", filename)); |
| } |
| exchange.getIn().setBody(new DBCursorFilenameReader(cursor), Reader.class); |
| } else if ("count".equals(operation)) { |
| final String filename = exchange.getIn().getHeader(Exchange.FILE_NAME, String.class); |
| DBCursor cursor; |
| if (filename == null) { |
| cursor = endpoint.getGridFs().getFileList(); |
| } else { |
| cursor = endpoint.getGridFs().getFileList(new BasicDBObject("filename", filename)); |
| } |
| exchange.getIn().setBody(cursor.count(), Integer.class); |
| } |
| |
| } |
| |
| |
| private class DBCursorFilenameReader extends Reader { |
| DBCursor cursor; |
| StringBuilder current; |
| int pos; |
| |
| DBCursorFilenameReader(DBCursor c) { |
| cursor = c; |
| current = new StringBuilder(4096); |
| pos = 0; |
| fill(); |
| } |
| void fill() { |
| if (pos > 0) { |
| current.delete(0, pos); |
| pos = 0; |
| } |
| while (cursor.hasNext() && current.length() < 4000) { |
| DBObject o = cursor.next(); |
| current.append(o.get("filename")).append("\t").append(o.get("_id")).append("\n"); |
| } |
| } |
| @Override |
| public int read(char[] cbuf, int off, int len) throws IOException { |
| if (pos == current.length()) { |
| fill(); |
| } |
| if (pos == current.length()) { |
| return -1; |
| } |
| if (len > (current.length() - pos)) { |
| len = current.length() - pos; |
| } |
| current.getChars(pos, pos + len, cbuf, off); |
| pos += len; |
| return len; |
| } |
| |
| @Override |
| public void close() throws IOException { |
| cursor.close(); |
| } |
| } |
| } |