{"id":320,"date":"2007-10-17T00:00:00","date_gmt":"2007-10-17T00:00:00","guid":{"rendered":"http:\/\/www.strongd.net\/?p=320"},"modified":"2007-10-17T00:00:00","modified_gmt":"2007-10-17T00:00:00","slug":"J2ME: Test the RMS listener methods","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=320","title":{"rendered":"J2ME: Test the RMS listener methods"},"content":{"rendered":"

import <\/STRONG><\/FONT>java.io.*;<\/FONT>
import <\/B><\/FONT>javax.microedition.midlet.*;<\/FONT>
import <\/B><\/FONT>javax.microedition.rms.*;<\/FONT>
<\/FONT>
public class <\/B><\/FONT>RmsListener <\/FONT>extends <\/B><\/FONT>MIDlet<\/FONT>
{<\/FONT>
  <\/FONT>private <\/B><\/FONT>RecordStore rs = <\/FONT>null<\/B><\/FONT>;<\/FONT>
  <\/FONT>static final <\/B><\/FONT>String REC_STORE = <\/FONT>“db_8”<\/FONT>;<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>RmsListener<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>\/\/ Open record store and add listener<\/FONT>
    <\/FONT>openRecStore<\/FONT>()<\/FONT>;<\/FONT>
    <\/FONT>rs.addRecordListener<\/FONT>(<\/FONT>new <\/B><\/FONT>TestRecordListener<\/FONT>())<\/FONT>;<\/FONT>
<\/FONT>
    <\/FONT>\/\/ Initiate actions that will wake up the listener    <\/FONT>
    <\/FONT>writeRecord<\/FONT>(<\/FONT>“J2ME and MIDP”<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>updateRecord<\/FONT>(<\/FONT>“MIDP and J2ME”<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>deleteRecord<\/FONT>()<\/FONT>;<\/FONT>
    <\/FONT>
    <\/FONT>closeRecStore<\/FONT>()<\/FONT>;  <\/FONT>\/\/ Close record store<\/FONT>
    <\/FONT>deleteRecStore<\/FONT>()<\/FONT>; <\/FONT>\/\/ Remove the record store<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>destroyApp<\/FONT>( <\/FONT>boolean <\/B><\/FONT>unconditional <\/FONT>)<\/FONT>
  <\/FONT>{<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>startApp<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>\/\/ There is no user interface, go ahead and shutdown<\/FONT>
    <\/FONT>destroyApp<\/FONT>(<\/FONT>false<\/B><\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>notifyDestroyed<\/FONT>()<\/FONT>;<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>pauseApp<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>openRecStore<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>\/\/ The second parameter indicates that the record store<\/FONT>
      <\/FONT>\/\/ should be created if it does not exist<\/FONT>
      <\/FONT>rs = RecordStore.openRecordStore<\/FONT>(<\/FONT>REC_STORE, <\/FONT>true<\/B><\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}    <\/FONT>
  <\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>closeRecStore<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>rs.closeRecordStore<\/FONT>()<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>deleteRecStore<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>if <\/B><\/FONT>(<\/FONT>RecordStore.listRecordStores<\/FONT>() <\/FONT>!= <\/FONT>null<\/B><\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>try<\/B><\/FONT>
      <\/FONT>{<\/FONT>
        <\/FONT>RecordStore.deleteRecordStore<\/FONT>(<\/FONT>REC_STORE<\/FONT>)<\/FONT>;<\/FONT>
      <\/FONT>}<\/FONT>
      <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
      <\/FONT>{<\/FONT>
        <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
      <\/FONT>}<\/FONT>
    <\/FONT>}      <\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>writeRecord<\/FONT>(<\/FONT>String str<\/FONT>)<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>byte<\/B><\/FONT>[] <\/FONT>rec = str.getBytes<\/FONT>()<\/FONT>;<\/FONT>
<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>rs.addRecord<\/FONT>(<\/FONT>rec, <\/FONT>0<\/FONT>, rec.length<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>updateRecord<\/FONT>(<\/FONT>String str<\/FONT>)<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>rs.setRecord<\/FONT>(<\/FONT>1<\/FONT>, str.getBytes<\/FONT>()<\/FONT>, <\/FONT>0<\/FONT>, str.length<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>deleteRecord<\/FONT>()<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>rs.deleteRecord<\/FONT>(<\/FONT>1<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>db<\/FONT>(<\/FONT>e.toString<\/FONT>())<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>\/*————————————————–<\/FONT>
  <\/FONT>* Simple message to console for debug\/errors<\/FONT>
  <\/FONT>* When used with Exceptions we should handle the <\/FONT>
  <\/FONT>* error in a more appropriate manner.<\/FONT>
  <\/FONT>*————————————————-*\/<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>db<\/FONT>(<\/FONT>String str<\/FONT>)<\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>System.err.println<\/FONT>(<\/FONT>“Msg: ” <\/FONT>+ str<\/FONT>)<\/FONT>;<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
}<\/FONT>
<\/FONT>
<\/FONT>
\/*————————————————–<\/FONT>
* Listen for updates to the record store<\/FONT>
*————————————————-*\/<\/FONT>
class <\/B><\/FONT>TestRecordListener <\/FONT>implements <\/B><\/FONT>RecordListener<\/FONT>
{<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>recordAdded<\/FONT>(<\/FONT>RecordStore recordStore, <\/FONT>int <\/B><\/FONT>recordId<\/FONT>) <\/FONT>
  <\/FONT>{ <\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.out.println<\/FONT>(<\/FONT>“Record with ID#: ” <\/FONT>+ recordId + <\/FONT>
                         <\/FONT>” added to RecordStore: ” <\/FONT>+ recordStore.getName<\/FONT>())<\/FONT>; <\/FONT>
    <\/FONT>}<\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.err.println<\/FONT>(<\/FONT>e<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>} <\/FONT>
  <\/FONT>} <\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>recordDeleted<\/FONT>(<\/FONT>RecordStore recordStore, <\/FONT>int <\/B><\/FONT>recordId<\/FONT>) <\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.out.println<\/FONT>(<\/FONT>“Record with ID#: ” <\/FONT>+ recordId + <\/FONT>
                         <\/FONT>” deleted from RecordStore: ” <\/FONT>+ recordStore.getName<\/FONT>())<\/FONT>; <\/FONT>
    <\/FONT>} <\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.err.println<\/FONT>(<\/FONT>e<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>}<\/FONT>
<\/FONT>
  <\/FONT>public <\/B><\/FONT>void <\/B><\/FONT>recordChanged<\/FONT>(<\/FONT>RecordStore recordStore, <\/FONT>int <\/B><\/FONT>recordId<\/FONT>) <\/FONT>
  <\/FONT>{<\/FONT>
    <\/FONT>try<\/B><\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.out.println<\/FONT>(<\/FONT>“Record with ID#: ” <\/FONT>+ recordId + <\/FONT>
                         <\/FONT>” changed in RecordStore: ” <\/FONT>+ recordStore.getName<\/FONT>())<\/FONT>; <\/FONT>
    <\/FONT>} <\/FONT>
    <\/FONT>catch <\/B><\/FONT>(<\/FONT>Exception e<\/FONT>)<\/FONT>
    <\/FONT>{<\/FONT>
      <\/FONT>System.err.println<\/FONT>(<\/FONT>e<\/FONT>)<\/FONT>;<\/FONT>
    <\/FONT>}<\/FONT>
  <\/FONT>} <\/FONT>
}<\/FONT><\/FONT>

\n

<\/DIV><\/p>\n","protected":false},"excerpt":{"rendered":"

import java.io.*;import javax.microedition.midlet.*;import javax.microedition.rms.*;public class RmsListener extends MIDlet{  private RecordStore rs = null;  static final String REC_STORE = “db_8”;  public RmsListener()  {    \/\/ Open record store and add listener    openRecStore();    rs.addRecordListener(new TestRecordListener());    \/\/ Initiate actions that will wake up the listener        writeRecord(“J2ME and MIDP”);    updateRecord(“MIDP and J2ME”);    deleteRecord();        closeRecStore();  \/\/ Close record store    deleteRecStore(); \/\/ Remove the record store  }  public void destroyApp( boolean unconditional )  {  }  public void startApp()  {    \/\/ There is no user interface, go ahead and shutdown    destroyApp(false);    notifyDestroyed();  }  public void pauseApp()  {  }  public void openRecStore()  {    try    {      \/\/ The second parameter indicates that the record store      \/\/ should be created if it does not exist      rs = RecordStore.openRecordStore(REC_STORE, true);    }    catch (Exception e)    {      db(e.toString());    }  }        public void closeRecStore()  {    try    {      rs.closeRecordStore();    }    catch (Exception e)    {      db(e.toString());    }  }  public void deleteRecStore()  {    if (RecordStore.listRecordStores() != null)    {      try      {        RecordStore.deleteRecordStore(REC_STORE);      }      catch (Exception e)      {        db(e.toString());      }    }        }  public void writeRecord(String str)  {    byte[] rec = str.getBytes();    try    {      rs.addRecord(rec, 0, rec.length);    }    catch (Exception e)    {      db(e.toString());    }  }  public void updateRecord(String str)  {    try    {      rs.setRecord(1, str.getBytes(), 0, str.length());    }    catch (Exception e)    {      db(e.toString());    }  }  public void deleteRecord()  {    try    {      rs.deleteRecord(1);    }    catch (Exception e)    {      db(e.toString());    }  }  \/*————————————————–  * Simple message to console for debug\/errors  * When used with Exceptions we should handle the   * error in a more appropriate manner.  *————————————————-*\/  public void db(String str)  {    System.err.println(“Msg: ” + str);  }}\/*————————————————–* Listen for updates to the record store*————————————————-*\/class TestRecordListener implements RecordListener{  public void recordAdded(RecordStore recordStore, int recordId)   {     try    {      System.out.println(“Record with ID#: ” + recordId +                          ” added to RecordStore: ” + recordStore.getName());     }    catch (Exception e)    {      System.err.println(e);    }   }   public void recordDeleted(RecordStore recordStore, int recordId)   {    try    {      System.out.println(“Record with ID#: ” + recordId +                          ” deleted from RecordStore: ” + recordStore.getName());     }     catch (Exception e)    {      System.err.println(e);    }  }  public void recordChanged(RecordStore recordStore, int recordId)   {    try    {      System.out.println(“Record with ID#: ” + recordId +                          ” changed in RecordStore: ” + recordStore.getName());     }     catch (Exception e)    {      System.err.println(e);    }  } }<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-320","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/320","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=320"}],"version-history":[{"count":0,"href":"https:\/\/www.strongd.net\/index.php?rest_route=\/wp\/v2\/posts\/320\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.strongd.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}