| | |
| | | private boolean sslEncryption; |
| | | |
| | | /** |
| | | * NOTE: Starting from protocol V4, we introduce a dedicated PDU for answering |
| | | * to the DS ServerStartMsg. This is the ReplServerStartDSMsg. So the |
| | | * degradedStatusThreshold value being used only by a DS, it could be removed |
| | | * from the ReplServerStartMsg PDU. However for a smoothly transition to V4 |
| | | * protocol, we prefer to let this variable also in this PDU but the one |
| | | * really used is in the ReplServerStartDSMsg PDU. This prevents from having |
| | | * only RSv3 able to connect to RSv4 as connection initiator. |
| | | * |
| | | * Threshold value used by the RS to determine if a DS must be put in |
| | | * degraded status because the number of pending changes for him has crossed |
| | | * this value. This field is only used by a DS. |
| | |
| | | allowedPduTypes[1] = MSG_TYPE_REPL_SERVER_START_V1; |
| | | headerLength = decodeHeader(allowedPduTypes, in); |
| | | |
| | | // Protocol version has been read as part of the header: |
| | | // decode the body according to the protocol version read in the header |
| | | switch(protocolVersion) |
| | | { |
| | | case ProtocolVersion.REPLICATION_PROTOCOL_V1: |
| | | decodeBody_V1(in, headerLength); |
| | | return; |
| | | } |
| | | |
| | | try |
| | | { |
| | | /* The ReplServerStartMsg payload is stored in the form : |
| | |
| | | sslEncryption = Boolean.valueOf(new String(in, pos, length, "UTF-8")); |
| | | pos += length +1; |
| | | |
| | | // For easiness (no additional method), simply compare PDU type to |
| | | // know if we have to read new parameters of V2 |
| | | if (in[0] == MSG_TYPE_REPL_SERVER_START) |
| | | { |
| | | /** |
| | | * read the degraded status threshold |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | degradedStatusThreshold = |
| | | Integer.valueOf(new String(in, pos, length, "UTF-8")); |
| | | pos += length + 1; |
| | | } |
| | | /** |
| | | * read the degraded status threshold |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | degradedStatusThreshold = |
| | | Integer.valueOf(new String(in, pos, length, "UTF-8")); |
| | | pos += length + 1; |
| | | |
| | | // Read the ServerState |
| | | // Caution: ServerState MUST be the last field. Because ServerState can |
| | | // contain null character (string termination of sererid string ..) it |
| | | // contain null character (string termination of serverid string ..) it |
| | | // cannot be decoded using getNextLength() like the other fields. The |
| | | // only way is to rely on the end of the input buffer : and that forces |
| | | // the ServerState to be the last. This should be changed and we want to |
| | | // have more than one ServerState field. |
| | | serverState = new ServerState(in, pos, in.length - 1); |
| | | } catch (UnsupportedEncodingException e) |
| | | { |
| | | throw new DataFormatException("UTF-8 is not supported by this jvm."); |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * Decodes the body of a just received ReplServerStartMsg. The body is in the |
| | | * passed array, and starts at the provided location. This is for a PDU |
| | | * encoded in V1 protocol version. |
| | | * @param in A byte array containing the body for the ReplServerStartMsg |
| | | * @param pos The position in the array where the decoding should start |
| | | * @throws DataFormatException If the in does not contain a properly |
| | | * encoded ReplServerStartMsg. |
| | | */ |
| | | public void decodeBody_V1(byte[] in, int pos) throws DataFormatException |
| | | { |
| | | try |
| | | { |
| | | /* The ReplServerStartMsg payload is stored in the form : |
| | | * <baseDn><serverId><serverURL><windowSize><sslEncryption> |
| | | * <serverState> |
| | | */ |
| | | |
| | | /* read the dn |
| | | * first calculate the length then construct the string |
| | | */ |
| | | int length = getNextLength(in, pos); |
| | | baseDn = new String(in, pos, length, "UTF-8"); |
| | | pos += length +1; |
| | | |
| | | /* |
| | | * read the ServerId |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | String serverIdString = new String(in, pos, length, "UTF-8"); |
| | | serverId = Integer.valueOf(serverIdString); |
| | | pos += length +1; |
| | | |
| | | /* |
| | | * read the ServerURL |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | serverURL = new String(in, pos, length, "UTF-8"); |
| | | pos += length +1; |
| | | |
| | | /* |
| | | * read the window size |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | windowSize = Integer.valueOf(new String(in, pos, length, "UTF-8")); |
| | | pos += length +1; |
| | | |
| | | /* |
| | | * read the sslEncryption setting |
| | | */ |
| | | length = getNextLength(in, pos); |
| | | sslEncryption = Boolean.valueOf(new String(in, pos, length, "UTF-8")); |
| | | pos += length +1; |
| | | |
| | | // Read the ServerState |
| | | // Caution: ServerState MUST be the last field. Because ServerState can |
| | | // contain null character (string termination of serverid string ..) it |
| | | // cannot be decoded using getNextLength() like the other fields. The |
| | | // only way is to rely on the end of the input buffer : and that forces |
| | | // the ServerState to be the last. This should be changed and we want to |
| | |
| | | public byte[] getBytes(short protocolVersion) |
| | | throws UnsupportedEncodingException |
| | | { |
| | | if (protocolVersion == ProtocolVersion.REPLICATION_PROTOCOL_V1) |
| | | return getBytes_V1(); |
| | | // If an older version requested, encode in the requested way |
| | | switch(protocolVersion) |
| | | { |
| | | case ProtocolVersion.REPLICATION_PROTOCOL_V1: |
| | | return getBytes_V1(); |
| | | } |
| | | |
| | | /* The ReplServerStartMsg is stored in the form : |
| | | * <operation type><baseDn><serverId><serverURL><windowSize><sslEncryption> |
| | |
| | | String.valueOf(degradedStatusThreshold).getBytes("UTF-8"); |
| | | |
| | | int length = byteDn.length + 1 + byteServerId.length + 1 + |
| | | byteServerUrl.length + 1 + byteWindowSize.length + 1 + |
| | | byteSSLEncryption.length + 1 + |
| | | byteDegradedStatusThreshold.length + 1 + |
| | | byteServerState.length + 1; |
| | | byteServerUrl.length + 1 + byteWindowSize.length + 1 + |
| | | byteSSLEncryption.length + 1 + |
| | | byteDegradedStatusThreshold.length + 1 + |
| | | byteServerState.length + 1; |
| | | |
| | | /* encode the header in a byte[] large enough to also contain the mods */ |
| | | /* encode the header in a byte[] large enough */ |
| | | byte resultByteArray[] = |
| | | encodeHeader(MSG_TYPE_REPL_SERVER_START, length, protocolVersion); |
| | | |
| | |
| | | byteSSLEncryption.length + 1 + |
| | | byteServerState.length + 1; |
| | | |
| | | /* encode the header in a byte[] large enough to also contain the mods */ |
| | | /* encode the header in a byte[] large enough */ |
| | | byte resultByteArray[] = encodeHeader_V1(MSG_TYPE_REPL_SERVER_START_V1, |
| | | length); |
| | | int pos = headerLength; |
| | |
| | | return null; |
| | | } |
| | | } |
| | | |
| | | } |