src/main/java/org/onap/dmaap/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 org.onap.dmaap.dmf.mr.resources.streamReaders;
  23
  24 import org.onap.dmaap.dmf.mr.CambriaApiException;
  25 import org.onap.dmaap.dmf.mr.backends.Publisher.message;
  26 import org.onap.dmaap.dmf.mr.beans.LogDetails;
  27 import org.onap.dmaap.dmf.mr.resources.CambriaEventSet.reader;
  28
  29 import javax.servlet.http.HttpServletResponse;
  30 import java.io.BufferedReader;
  31 import java.io.IOException;
  32 import java.io.InputStream;
  33 import java.io.InputStreamReader;
  34
  35 /**
  36  * This stream reader just pulls single lines. It uses the default partition if provided. If
  37  * not, the key is the current time, which does not guarantee ordering.
  38  *
  39  * @author peter
  40  *
  41  */
  42 public class CambriaTextStreamReader implements reader
  43 {
  44         /**
  45          * This is the constructor for Cambria Text Reader format
  46          * @param is
  47          * @param defPart
  48          * @throws CambriaApiException
  49          */
  50         public CambriaTextStreamReader ( InputStream is, String defPart ) throws CambriaApiException
  51         {
  52                 fReader = new BufferedReader ( new InputStreamReader ( is ) );
  53                 fDefPart = defPart;
  54         }
  55
  56         @Override
  57         /**
  58          * next() method iterates through msg length
  59          * throws IOException
  60          * throws CambriaApiException
  61          *
  62          */
  63         public message next () throws CambriaApiException
  64         {
  65                 try
  66                 {
  67                         final String line = fReader.readLine ();
  68                         if ( line == null ) {
  69                                 return null;
  70                         }
  71
  72                         return new message ()
  73                         {
  74                                 private LogDetails logDetails;
  75                                 private boolean transactionEnabled;
  76
  77                                 /**
  78                                  * returns boolean value which
  79                                  * indicates whether transaction is enabled
  80                                  * @return
  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                                  * @return
 110                                  */
 111                                 public String getMessage ()
 112                                 {
 113                                         return line;
 114                                 }
 115
 116                                 @Override
 117                                 /**
 118                                  * set log details in logDetails variable
 119                                  */
 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 BufferedReader fReader;
 140         private final String fDefPart;
 141 }