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 java.io.IOException;
  25 import java.io.InputStream;
  26
  27 import javax.servlet.http.HttpServletResponse;
  28
  29 import org.onap.dmaap.dmf.mr.CambriaApiException;
  30 import org.onap.dmaap.dmf.mr.backends.Publisher.message;
  31 import org.onap.dmaap.dmf.mr.beans.LogDetails;
  32 import org.onap.dmaap.dmf.mr.resources.CambriaEventSet.reader;
  33 import com.att.nsa.util.StreamTools;
  34
  35 /**
  36  *
  37  * This stream reader reads raw bytes creating a single message.
  38  * @author peter
  39  *
  40  */
  41 public class CambriaRawStreamReader implements reader
  42 {
  43         /**
  44          * This is the constructor of CambriaRawStreamReader, it will basically the read from Input stream
  45          * @param is
  46          * @param defPart
  47          * @throws CambriaApiException
  48          */
  49         public CambriaRawStreamReader ( InputStream is, String defPart ) throws CambriaApiException
  50         {
  51                 fStream = is;
  52                 fDefPart = defPart;
  53                 fClosed = false;
  54         }
  55
  56         @Override
  57         /**
  58          *
  59          * next() method reads the bytes and
  60          * iterates through the messages
  61          * @throws CambriaApiException
  62          *
  63          */
  64         public message next () throws CambriaApiException
  65         {
  66                 if ( fClosed ){
  67                         return null;
  68                 }
  69
  70                 try
  71                 {
  72                         final byte[] rawBytes = StreamTools.readBytes ( fStream );
  73                         fClosed = true;
  74                         return new message ()
  75                         {
  76                                 private LogDetails logDetails;
  77                                 private boolean transactionEnabled;
  78
  79                                 /**
  80                                  * returns boolean value which
  81                                  * indicates whether transaction is enabled
  82                                  */
  83                                 public boolean isTransactionEnabled() {
  84                                         return transactionEnabled;
  85                                 }
  86
  87                                 /**
  88                                  * sets boolean value which
  89                                  * indicates whether transaction is enabled
  90                                  */
  91                                 public void setTransactionEnabled(boolean transactionEnabled) {
  92                                         this.transactionEnabled = transactionEnabled;
  93                                 }
  94
  95                                 @Override
  96                                 /**
  97                                  * @returns key
  98                                  * It ch4ecks whether fDefPart value is Null.
  99                                  * If yes, it will return ystem.currentTimeMillis () else
 100                                  * it will return fDefPart variable value
 101                                  */
 102                                 public String getKey ()
 103                                 {
 104                                         return fDefPart == null ? "" + System.currentTimeMillis () : fDefPart;
 105                                 }
 106
 107                                 @Override
 108                                 /**
 109                                  * returns the message in String type object
 110                                  */
 111                                 public String getMessage ()
 112                                 {
 113                                         return new String ( rawBytes );
 114                                 }
 115
 116                                 /**
 117                                  * set log details in logDetails variable
 118                                  */
 119                                 @Override
 120                                 public void setLogDetails(LogDetails logDetails) {
 121                                         this.logDetails = logDetails;
 122                                 }
 123
 124                                 @Override
 125                                 /**
 126                                  * get the log details
 127                                  */
 128                                 public LogDetails getLogDetails() {
 129                                         return this.logDetails;
 130                                 }
 131                         };
 132                 }
 133                 catch ( IOException e )
 134                 {
 135                         throw new CambriaApiException ( HttpServletResponse.SC_BAD_REQUEST, e.getMessage () );
 136                 }
 137         }
 138
 139         private final InputStream fStream;
 140         private final String fDefPart;
 141         private boolean fClosed;
 142
 143 }