How to use

get

method

in

jetbrains.exodus.env.Store

@Override
public byte[] get(byte[] key) {
  key.getClass();
  Preconditions.checkState(!this.closed.get(), "transaction closed");
  final ByteIterable bytes = this.store.get(this.tx, new ArrayByteIterable(key));
  return bytes != null ? XodusKVStore.get(bytes, true) : null;
}

@Nullable 
protected byte[] readBytes(Store store, Transaction txn, ByteIterable key) {
  ByteIterable value = store.get(txn, key);
  if (value != null) 
    return Arrays.copyOf(value.getBytesUnsafe(), value.getLength());
  else
    return null;
}

@Benchmark
public void readKey(final Reader r, final Blackhole bh) {
 for (final int key : r.keys) {
  if (r.intKey) {
   final ByteIterable val = r.store.get(r.tx, intToEntry(key));
   if (val != null) {
    bh.consume(val.getBytesUnsafe());
   }
  } else {
   final ByteIterable val = r.store.get(r.tx, stringToEntry(r.padKey(key)));
   if (val != null) {
    bh.consume(val.getBytesUnsafe());
   }
  }
 }
}

@Override
public String get( final LocalDB.DB db, final String key ) throws LocalDBException
{
  checkStatus( false );
  return environment.computeInReadonlyTransaction( transaction ->
  {
    final Store store = getStore( db );
    final ByteIterable returnValue = store.get( transaction, bindMachine.keyToEntry( key ) );
    if ( returnValue != null )
    {
      return bindMachine.entryToValue( returnValue );
    }
    return null;
  } );
}

@LocalDB.WriteOperation
public boolean putIfAbsent( final LocalDB.DB db, final String key, final String value ) throws LocalDBException
{
  checkStatus( true );
  return environment.computeInTransaction( transaction ->
  {
    final ByteIterable k = bindMachine.keyToEntry( key );
    final ByteIterable v = bindMachine.valueToEntry( value );
    final Store store = getStore( db );
    final ByteIterable existingValue = store.get( transaction, k );
    if ( existingValue != null )
    {
      return false;
    }
    return store.put( transaction, k, v );
  } );
}

ByteIterable oldEntityIdEntry = indexTable.getDatabase().get(txn.getEnvironmentTransaction(), propsEntry);
assert oldEntityIdEntry != null;
long oldEntityId = LongBinding.compressedEntryToLong(oldEntityIdEntry);