src/main/java/com/att/dmf/mr/resources/streamReaders/CambriaTextStreamReader.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 com.att.dmf.mr.resources.streamReaders;
  23
  24 import java.io.BufferedReader;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.io.InputStreamReader;
  28
  29 import javax.servlet.http.HttpServletResponse;
  30
  31 import com.att.dmf.mr.CambriaApiException;
  32 import com.att.dmf.mr.backends.Publisher.message;
  33 import com.att.dmf.mr.beans.LogDetails;
  34 import com.att.dmf.mr.resources.CambriaEventSet.reader;
  35
  36 /**
  37  * This stream reader just pulls single lines. It uses the default partition if provided. If
  38  * not, the key is the current time, which does not guarantee ordering.
  39  *
  40  * @author peter
  41  *
  42  */
  43 public class CambriaTextStreamReader implements reader
  44 {
  45         /**
  46          * This is the constructor for Cambria Text Reader format
  47          * @param is
  48          * @param defPart
  49          * @throws CambriaApiException
  50          */
  51         public CambriaTextStreamReader ( InputStream is, String defPart ) throws CambriaApiException
  52         {
  53                 fReader = new BufferedReader ( new InputStreamReader ( is ) );
  54                 fDefPart = defPart;
  55         }
  56
  57         @Override
  58         /**
  59          * next() method iterates through msg length
  60          * throws IOException
  61          * throws CambriaApiException
  62          *
  63          */
  64         public message next () throws CambriaApiException
  65         {
  66                 try
  67                 {
  68                         final String line = fReader.readLine ();
  69                         if ( line == null ) return null;
  70
  71                         return new message ()
  72                         {
  73                                 private LogDetails logDetails;
  74                                 private boolean transactionEnabled;
  75
  76                                 /**
  77                                  * returns boolean value which
  78                                  * indicates whether transaction is enabled
  79                                  * @return
  80                                  */
  81                                 public boolean isTransactionEnabled() {
  82                                         return transactionEnabled;
  83                                 }
  84
  85                                 /**
  86                                  * sets boolean value which
  87                                  * indicates whether transaction is enabled
  88                                  */
  89                                 public void setTransactionEnabled(boolean transactionEnabled) {
  90                                         this.transactionEnabled = transactionEnabled;
  91                                 }
  92
  93                                 @Override
  94                                 /**
  95                                  * @returns key
  96                                  * It ch4ecks whether fDefPart value is Null.
  97                                  * If yes, it will return ystem.currentTimeMillis () else
  98                                  * it will return fDefPart variable value
  99                                  */
 100                                 public String getKey ()
 101                                 {
 102                                         return fDefPart == null ? "" + System.currentTimeMillis () : fDefPart;
 103                                 }
 104
 105                                 @Override
 106                                 /**
 107                                  * returns the message in String type object
 108                                  * @return
 109                                  */
 110                                 public String getMessage ()
 111                                 {
 112                                         return line;
 113                                 }
 114
 115                                 @Override
 116                                 /**
 117                                  * set log details in logDetails variable
 118                                  */
 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 BufferedReader fReader;
 139         private final String fDefPart;
 140 }