src/main/java/org/onap/dmaap/dmf/mr/resources/streamReaders/CambriaRawStreamReader.java

   1 /*******************************************************************************
   2  *  ============LICENSE_START=======================================================
   3  *  org.onap.dmaap
   4  *  ================================================================================
   5  *  Copyright © 2017 AT&T Intellectual Property. All rights reserved.
   6  *  ================================================================================
   7  *  Licensed under the Apache License, Version 2.0 (the "License");
   8  *  you may not use this file except in compliance with the License.
   9  *  You may obtain a copy of the License at
  10  *        http://www.apache.org/licenses/LICENSE-2.0
  11 *
  12  *  Unless required by applicable law or agreed to in writing, software
  13  *  distributed under the License is distributed on an "AS IS" BASIS,
  14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  *  See the License for the specific language governing permissions and
  16  *  limitations under the License.
  17  *  ============LICENSE_END=========================================================
  18  *
  19  *  ECOMP is a trademark and service mark of AT&T Intellectual Property.
  20  *
  21  *******************************************************************************/
  22 package org.onap.dmaap.dmf.mr.resources.streamReaders;
  23
  24 import com.att.nsa.util.StreamTools;
  25 import org.onap.dmaap.dmf.mr.CambriaApiException;
  26 import org.onap.dmaap.dmf.mr.backends.Publisher.message;
  27 import org.onap.dmaap.dmf.mr.beans.LogDetails;
  28 import org.onap.dmaap.dmf.mr.resources.CambriaEventSet.reader;
  29
  30 import javax.servlet.http.HttpServletResponse;
  31 import java.io.IOException;
  32 import java.io.InputStream;
  33
  34 /**
  35  *
  36  * This stream reader reads raw bytes creating a single message.
  37  * @author peter
  38  *
  39  */
  40 public class CambriaRawStreamReader implements reader
  41 {
  42         /**
  43          * This is the constructor of CambriaRawStreamReader, it will basically the read from Input stream
  44          * @param is
  45          * @param defPart
  46          * @throws CambriaApiException
  47          */
  48         public CambriaRawStreamReader ( InputStream is, String defPart ) throws CambriaApiException
  49         {
  50                 fStream = is;
  51                 fDefPart = defPart;
  52                 fClosed = false;
  53         }
  54
  55         @Override
  56         /**
  57          *
  58          * next() method reads the bytes and
  59          * iterates through the messages
  60          * @throws CambriaApiException
  61          *
  62          */
  63         public message next () throws CambriaApiException
  64         {
  65                 if ( fClosed ){
  66                         return null;
  67                 }
  68
  69                 try
  70                 {
  71                         final byte[] rawBytes = StreamTools.readBytes ( fStream );
  72                         fClosed = true;
  73                         return new message ()
  74                         {
  75                                 private LogDetails logDetails;
  76                                 private boolean transactionEnabled;
  77
  78                                 /**
  79                                  * returns boolean value which
  80                                  * indicates whether transaction is enabled
  81                                  */
  82                                 public boolean isTransactionEnabled() {
  83                                         return transactionEnabled;
  84                                 }
  85
  86                                 /**
  87                                  * sets boolean value which
  88                                  * indicates whether transaction is enabled
  89                                  */
  90                                 public void setTransactionEnabled(boolean transactionEnabled) {
  91                                         this.transactionEnabled = transactionEnabled;
  92                                 }
  93
  94                                 @Override
  95                                 /**
  96                                  * @returns key
  97                                  * It ch4ecks whether fDefPart value is Null.
  98                                  * If yes, it will return ystem.currentTimeMillis () else
  99                                  * it will return fDefPart variable value
 100                                  */
 101                                 public String getKey ()
 102                                 {
 103                                         return fDefPart == null ? "" + System.currentTimeMillis () : fDefPart;
 104                                 }
 105
 106                                 @Override
 107                                 /**
 108                                  * returns the message in String type object
 109                                  */
 110                                 public String getMessage ()
 111                                 {
 112                                         return new String ( rawBytes );
 113                                 }
 114
 115                                 /**
 116                                  * set log details in logDetails variable
 117                                  */
 118                                 @Override
 119                                 public void setLogDetails(LogDetails logDetails) {
 120                                         this.logDetails = logDetails;
 121                                 }
 122
 123                                 @Override
 124                                 /**
 125                                  * get the log details
 126                                  */
 127                                 public LogDetails getLogDetails() {
 128                                         return this.logDetails;
 129                                 }
 130                         };
 131                 }
 132                 catch ( IOException e )
 133                 {
 134                         throw new CambriaApiException ( HttpServletResponse.SC_BAD_REQUEST, e.getMessage () );
 135                 }
 136         }
 137
 138         private final InputStream fStream;
 139         private final String fDefPart;
 140         private boolean fClosed;
 141
 142 }