src/main/java/com/att/nsa/cambria/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.nsa.cambria.resources.streamReaders;
  23
  24 import java.io.BufferedReader;
  25 import java.io.IOException;
  26 import java.io.InputStream;
  27 import java.io.InputStreamReader;
  28 import java.util.logging.Logger;
  29
  30 import javax.servlet.http.HttpServletResponse;
  31
  32 import com.att.nsa.cambria.CambriaApiException;
  33 import com.att.nsa.cambria.backends.Publisher.message;
  34 import com.att.nsa.cambria.beans.LogDetails;
  35 import com.att.nsa.cambria.resources.CambriaEventSet.reader;
  36
  37 import jline.internal.Log;
  38
  39 /**
  40  * This stream reader just pulls single lines. It uses the default partition if provided. If
  41  * not, the key is the current time, which does not guarantee ordering.
  42  *
  43  * @author author
  44  *
  45  */
  46 public class CambriaTextStreamReader implements reader
  47 {
  48         private Logger log = Logger.getLogger(CambriaTextStreamReader.class.toString());
  49         /**
  50          * This is the constructor for Cambria Text Reader format
  51          * @param is
  52          * @param defPart
  53          * @throws CambriaApiException
  54          */
  55         public CambriaTextStreamReader ( InputStream is, String defPart ) throws CambriaApiException
  56         {
  57                 fReader = new BufferedReader ( new InputStreamReader ( is ) );
  58                 fDefPart = defPart;
  59         }
  60
  61         @Override
  62         /**
  63          * next() method iterates through msg length
  64          * throws IOException
  65          * throws CambriaApiException
  66          *
  67          */
  68         public message next () throws CambriaApiException
  69         {
  70                 try
  71                 {
  72                         final String line = fReader.readLine ();
  73                         if ( line == null ) return null;
  74
  75                         return new message ()
  76                         {
  77                                 private LogDetails logDetails;
  78                                 private boolean transactionEnabled;
  79
  80                                 /**
  81                                  * returns boolean value which
  82                                  * indicates whether transaction is enabled
  83                                  * @return
  84                                  */
  85                                 public boolean isTransactionEnabled() {
  86                                         return transactionEnabled;
  87                                 }
  88
  89                                 /**
  90                                  * sets boolean value which
  91                                  * indicates whether transaction is enabled
  92                                  */
  93                                 public void setTransactionEnabled(boolean transactionEnabled) {
  94                                         this.transactionEnabled = transactionEnabled;
  95                                 }
  96
  97                                 @Override
  98                                 /**
  99                                  * @returns key
 100                                  * It ch4ecks whether fDefPart value is Null.
 101                                  * If yes, it will return ystem.currentTimeMillis () else
 102                                  * it will return fDefPart variable value
 103                                  */
 104                                 public String getKey ()
 105                                 {
 106                                         return fDefPart == null ? "" + System.currentTimeMillis () : fDefPart;
 107                                 }
 108
 109                                 @Override
 110                                 /**
 111                                  * returns the message in String type object
 112                                  * @return
 113                                  */
 114                                 public String getMessage ()
 115                                 {
 116                                         return line;
 117                                 }
 118
 119                                 @Override
 120                                 /**
 121                                  * set log details in logDetails variable
 122                                  */
 123                                 public void setLogDetails(LogDetails logDetails) {
 124                                         this.logDetails = logDetails;
 125                                 }
 126
 127                                 @Override
 128                                 /**
 129                                  * get the log details
 130                                  */
 131                                 public LogDetails getLogDetails() {
 132                                         return this.logDetails;
 133                                 }
 134                         };
 135                 }
 136                 catch ( IOException e )
 137                 {
 138                         Log.error(e);
 139                         throw new CambriaApiException ( HttpServletResponse.SC_BAD_REQUEST, e.getMessage () );
 140                 }
 141         }
 142
 143         private final BufferedReader fReader;
 144         private final String fDefPart;
 145 }