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DBZ-623 Extract parsing code to a separate method

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This commit is contained in:
Jiri Pechanec 2018-02-22 10:51:21 +01:00 committed by Gunnar Morling
parent 80c74a9d7c
commit 01e5f8da8c
1 changed files with 29 additions and 24 deletions
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53
debezium-connector-postgres/src/main/java/io/debezium/connector/postgresql/connection/PostgresConnection.java
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@ -133,30 +133,7 @@ protected ServerInfo.ReplicationSlot readReplicationSlotInfo(String slotName, St
}, rs -> {
if (rs.next()) {
boolean active = rs.getBoolean("active");
Long confirmedFlushedLSN = null;
try {
String confirmedFlushLSNString = rs.getString("confirmed_flush_lsn");
if (confirmedFlushLSNString == null) {
throw new ConnectException("Value confirmed_flush_lsn is missing from the pg_replication_slots table for slot = '"
+ slotName + "', plugin = '"
+ database + "', database = '"
+ pluginName + "'. This is an abnormal situation and the database status should be checked.");
}
try {
confirmedFlushedLSN = LogSequenceNumber.valueOf(confirmedFlushLSNString).asLong();
if (confirmedFlushedLSN == LogSequenceNumber.INVALID_LSN.asLong()) {
throw new ConnectException("Invalid LSN returned from database");
}
}
catch (Exception e) {
throw new ConnectException("Value confirmed_flush_lsn in the pg_replication_slots table for slot = '"
+ slotName + "', plugin = '"
+ database + "', database = '"
+ pluginName + "' is not valid. This is an abnormal situation and the database status should be checked.");
}
} catch (SQLException e) {
// info not available, so we must be prior to PG 9.6
}
Long confirmedFlushedLSN = parseConfirmedFlushLsn(slotName, pluginName, database, rs);
replicationSlotInfo.compareAndSet(null, new ServerInfo.ReplicationSlot(active, confirmedFlushedLSN));
} else {
LOGGER.debug("No replication slot '{}' is present for plugin '{}' and database '{}'", slotName,
@ -168,6 +145,34 @@ protected ServerInfo.ReplicationSlot readReplicationSlotInfo(String slotName, St
return replicationSlotInfo.get();
}
private Long parseConfirmedFlushLsn(String slotName, String pluginName, String database, ResultSet rs) {
Long confirmedFlushedLSN = null;
try {
String confirmedFlushLSNString = rs.getString("confirmed_flush_lsn");
if (confirmedFlushLSNString == null) {
throw new ConnectException("Value confirmed_flush_lsn is missing from the pg_replication_slots table for slot = '"
+ slotName + "', plugin = '"
+ pluginName + "', database = '"
+ database + "'. This is an abnormal situation and the database status should be checked.");
}
try {
confirmedFlushedLSN = LogSequenceNumber.valueOf(confirmedFlushLSNString).asLong();
}
catch (Exception e) {
throw new ConnectException("Value confirmed_flush_lsn in the pg_replication_slots table for slot = '"
+ slotName + "', plugin = '"
+ pluginName + "', database = '"
+ database + "' is not valid. This is an abnormal situation and the database status should be checked.");
}
if (confirmedFlushedLSN == LogSequenceNumber.INVALID_LSN.asLong()) {
throw new ConnectException("Invalid LSN returned from database");
}
} catch (SQLException e) {
// info not available, so we must be prior to PG 9.6
}
return confirmedFlushedLSN;
}
/**
* Drops a replication slot that was created on the DB
*