Java Code Examples for com.alibaba.otter.canal.protocol.position.EntryPosition#getPosition()
The following examples show how to use
com.alibaba.otter.canal.protocol.position.EntryPosition#getPosition() .
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Example 1
| Source File: MysqlEventParser.java From canal-1.1.3 with Apache License 2.0 | 6 votes |
|
protected EntryPosition findPositionWithMasterIdAndTimestamp(MysqlConnection connection, EntryPosition fixedPosition) {
MysqlConnection mysqlConnection = (MysqlConnection) connection;
if (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {
// 使用一个未来极大的时间，基于位点进行定位
long startTimestamp = System.currentTimeMillis() + 102L * 365 * 24 * 3600 * 1000; // 当前时间的未来102年
EntryPosition entryPosition = findAsPerTimestampInSpecificLogFile(mysqlConnection,
startTimestamp,
fixedPosition,
fixedPosition.getJournalName(),
true);
if (entryPosition == null) {
throw new CanalParseException("[fixed timestamp] can't found begin/commit position before with fixed position"
+ fixedPosition.getJournalName() + ":" + fixedPosition.getPosition());
}
return entryPosition;
} else {
return fixedPosition;
}
}
Example 2
| Source File: MysqlEventParser.java From canal with Apache License 2.0 | 6 votes |
|
protected EntryPosition findPositionWithMasterIdAndTimestamp(MysqlConnection connection, EntryPosition fixedPosition) {
MysqlConnection mysqlConnection = (MysqlConnection) connection;
if (tableMetaTSDB != null && (fixedPosition.getTimestamp() == null || fixedPosition.getTimestamp() <= 0)) {
// 使用一个未来极大的时间，基于位点进行定位
long startTimestamp = System.currentTimeMillis() + 102L * 365 * 24 * 3600 * 1000; // 当前时间的未来102年
EntryPosition entryPosition = findAsPerTimestampInSpecificLogFile(mysqlConnection,
startTimestamp,
fixedPosition,
fixedPosition.getJournalName(),
true);
if (entryPosition == null) {
throw new CanalParseException("[fixed timestamp] can't found begin/commit position before with fixed position"
+ fixedPosition.getJournalName() + ":" + fixedPosition.getPosition());
}
return entryPosition;
} else {
return fixedPosition;
}
}
Example 3
| Source File: LocalBinlogEventParser.java From canal-1.1.3 with Apache License 2.0 | 5 votes |
|
@Override
protected EntryPosition findStartPosition(ErosaConnection connection) {
// 处理逻辑
// 1. 首先查询上一次解析成功的最后一条记录
// 2. 存在最后一条记录，判断一下当前记录是否发生过主备切换
// // a. 无机器切换，直接返回
// // b. 存在机器切换，按最后一条记录的stamptime进行查找
// 3. 不存在最后一条记录，则从默认的位置开始启动
LogPosition logPosition = logPositionManager.getLatestIndexBy(destination);
if (logPosition == null) {// 找不到历史成功记录
EntryPosition entryPosition = masterPosition;
// 判断一下是否需要按时间订阅
if (StringUtils.isEmpty(entryPosition.getJournalName())) {
// 如果没有指定binlogName，尝试按照timestamp进行查找
if (entryPosition.getTimestamp() != null) {
return new EntryPosition(entryPosition.getTimestamp());
}
} else {
if (entryPosition.getPosition() != null) {
// 如果指定binlogName + offest，直接返回
return entryPosition;
} else {
return new EntryPosition(entryPosition.getTimestamp());
}
}
} else {
return logPosition.getPostion();
}
return null;
}
Example 4
| Source File: CanalEventUtils.java From canal-1.1.3 with Apache License 2.0 | 5 votes |
|
/**
* 判断当前的entry和position是否相同
*/
public static boolean checkPosition(Event event, LogPosition logPosition) {
EntryPosition position = logPosition.getPostion();
boolean result = position.getTimestamp().equals(event.getExecuteTime());
boolean exactely = (StringUtils.isBlank(position.getJournalName()) && position.getPosition() == null);
if (!exactely) {// 精确匹配
result &= position.getPosition().equals(event.getPosition());
if (result) {// short path
result &= StringUtils.equals(event.getJournalName(), position.getJournalName());
}
}
return result;
}
Example 5
| Source File: LocalBinlogEventParser.java From canal with Apache License 2.0 | 5 votes |
|
@Override
protected EntryPosition findStartPosition(ErosaConnection connection) {
// 处理逻辑
// 1. 首先查询上一次解析成功的最后一条记录
// 2. 存在最后一条记录，判断一下当前记录是否发生过主备切换
// // a. 无机器切换，直接返回
// // b. 存在机器切换，按最后一条记录的stamptime进行查找
// 3. 不存在最后一条记录，则从默认的位置开始启动
LogPosition logPosition = logPositionManager.getLatestIndexBy(destination);
if (logPosition == null) {// 找不到历史成功记录
EntryPosition entryPosition = masterPosition;
// 判断一下是否需要按时间订阅
if (StringUtils.isEmpty(entryPosition.getJournalName())) {
// 如果没有指定binlogName，尝试按照timestamp进行查找
if (entryPosition.getTimestamp() != null) {
return new EntryPosition(entryPosition.getTimestamp());
}
} else {
if (entryPosition.getPosition() != null) {
// 如果指定binlogName + offest，直接返回
return entryPosition;
} else {
return new EntryPosition(entryPosition.getTimestamp());
}
}
} else {
return logPosition.getPostion();
}
return null;
}
Example 6
| Source File: CanalEventUtils.java From canal with Apache License 2.0 | 5 votes |
|
/**
* 判断当前的entry和position是否相同
*/
public static boolean checkPosition(Event event, LogPosition logPosition) {
EntryPosition position = logPosition.getPostion();
boolean result = position.getTimestamp().equals(event.getExecuteTime());
boolean exactely = (StringUtils.isBlank(position.getJournalName()) && position.getPosition() == null);
if (!exactely) {// 精确匹配
result &= position.getPosition().equals(event.getPosition());
if (result) {// short path
result &= StringUtils.equals(event.getJournalName(), position.getJournalName());
}
}
return result;
}
Example 7
| Source File: MysqlEventParser.java From canal-1.1.3 with Apache License 2.0 | 4 votes |
|
private Long findTransactionBeginPosition(ErosaConnection mysqlConnection, final EntryPosition entryPosition)
throws IOException {
// 针对开始的第一条为非Begin记录，需要从该binlog扫描
final java.util.concurrent.atomic.AtomicLong preTransactionStartPosition = new java.util.concurrent.atomic.AtomicLong(0L);
mysqlConnection.reconnect();
mysqlConnection.seek(entryPosition.getJournalName(), 4L, entryPosition.getGtid(), new SinkFunction<LogEvent>() {
private LogPosition lastPosition;
public boolean sink(LogEvent event) {
try {
CanalEntry.Entry entry = parseAndProfilingIfNecessary(event, true);
if (entry == null) {
return true;
}
// 直接查询第一条业务数据，确认是否为事务Begin
// 记录一下transaction begin position
if (entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONBEGIN
&& entry.getHeader().getLogfileOffset() < entryPosition.getPosition()) {
preTransactionStartPosition.set(entry.getHeader().getLogfileOffset());
}
if (entry.getHeader().getLogfileOffset() >= entryPosition.getPosition()) {
return false;// 退出
}
lastPosition = buildLastPosition(entry);
} catch (Exception e) {
processSinkError(e, lastPosition, entryPosition.getJournalName(), entryPosition.getPosition());
return false;
}
return running;
}
});
// 判断一下找到的最接近position的事务头的位置
if (preTransactionStartPosition.get() > entryPosition.getPosition()) {
logger.error("preTransactionEndPosition greater than startPosition from zk or localconf, maybe lost data");
throw new CanalParseException("preTransactionStartPosition greater than startPosition from zk or localconf, maybe lost data");
}
return preTransactionStartPosition.get();
}
Example 8
| Source File: MysqlEventParser.java From canal with Apache License 2.0 | 4 votes |
|
protected EntryPosition findStartPositionInternal(ErosaConnection connection) {
MysqlConnection mysqlConnection = (MysqlConnection) connection;
LogPosition logPosition = logPositionManager.getLatestIndexBy(destination);
if (logPosition == null) {// 找不到历史成功记录
EntryPosition entryPosition = null;
if (masterInfo != null && mysqlConnection.getConnector().getAddress().equals(masterInfo.getAddress())) {
entryPosition = masterPosition;
} else if (standbyInfo != null
&& mysqlConnection.getConnector().getAddress().equals(standbyInfo.getAddress())) {
entryPosition = standbyPosition;
}
if (entryPosition == null) {
entryPosition = findEndPositionWithMasterIdAndTimestamp(mysqlConnection); // 默认从当前最后一个位置进行消费
}
// 判断一下是否需要按时间订阅
if (StringUtils.isEmpty(entryPosition.getJournalName())) {
// 如果没有指定binlogName，尝试按照timestamp进行查找
if (entryPosition.getTimestamp() != null && entryPosition.getTimestamp() > 0L) {
logger.warn("prepare to find start position {}:{}:{}",
new Object[] { "", "", entryPosition.getTimestamp() });
return findByStartTimeStamp(mysqlConnection, entryPosition.getTimestamp());
} else {
logger.warn("prepare to find start position just show master status");
return findEndPositionWithMasterIdAndTimestamp(mysqlConnection); // 默认从当前最后一个位置进行消费
}
} else {
if (entryPosition.getPosition() != null && entryPosition.getPosition() > 0L) {
// 如果指定binlogName + offest，直接返回
entryPosition = findPositionWithMasterIdAndTimestamp(mysqlConnection, entryPosition);
logger.warn("prepare to find start position {}:{}:{}",
new Object[] { entryPosition.getJournalName(), entryPosition.getPosition(),
entryPosition.getTimestamp() });
return entryPosition;
} else {
EntryPosition specificLogFilePosition = null;
if (entryPosition.getTimestamp() != null && entryPosition.getTimestamp() > 0L) {
// 如果指定binlogName +
// timestamp，但没有指定对应的offest，尝试根据时间找一下offest
EntryPosition endPosition = findEndPosition(mysqlConnection);
if (endPosition != null) {
logger.warn("prepare to find start position {}:{}:{}",
new Object[] { entryPosition.getJournalName(), "", entryPosition.getTimestamp() });
specificLogFilePosition = findAsPerTimestampInSpecificLogFile(mysqlConnection,
entryPosition.getTimestamp(),
endPosition,
entryPosition.getJournalName(),
true);
}
}
if (specificLogFilePosition == null) {
// position不存在，从文件头开始
entryPosition.setPosition(BINLOG_START_OFFEST);
return entryPosition;
} else {
return specificLogFilePosition;
}
}
}
} else {
if (logPosition.getIdentity().getSourceAddress().equals(mysqlConnection.getConnector().getAddress())) {
if (dumpErrorCountThreshold >= 0 && dumpErrorCount > dumpErrorCountThreshold) {
// binlog定位位点失败,可能有两个原因:
// 1. binlog位点被删除
// 2.vip模式的mysql,发生了主备切换,判断一下serverId是否变化,针对这种模式可以发起一次基于时间戳查找合适的binlog位点
boolean case2 = (standbyInfo == null || standbyInfo.getAddress() == null)
&& logPosition.getPostion().getServerId() != null
&& !logPosition.getPostion().getServerId().equals(findServerId(mysqlConnection));
if (case2) {
EntryPosition findPosition = fallbackFindByStartTimestamp(logPosition, mysqlConnection);
dumpErrorCount = 0;
return findPosition;
}
Long timestamp = logPosition.getPostion().getTimestamp();
if (isRdsOssMode() && (timestamp != null && timestamp > 0)) {
// 如果binlog位点不存在，并且属于timestamp不为空,可以返回null走到oss binlog处理
return null;
}
} else if (StringUtils.isBlank(logPosition.getPostion().getJournalName())
&& logPosition.getPostion().getPosition() <= 0
&& logPosition.getPostion().getTimestamp() > 0) {
return fallbackFindByStartTimestamp(logPosition,mysqlConnection);
}
// 其余情况
logger.warn("prepare to find start position just last position\n {}",
JsonUtils.marshalToString(logPosition));
return logPosition.getPostion();
} else {
// 针对切换的情况，考虑回退时间
long newStartTimestamp = logPosition.getPostion().getTimestamp() - fallbackIntervalInSeconds * 1000;
logger.warn("prepare to find start position by switch {}:{}:{}", new Object[] { "", "",
logPosition.getPostion().getTimestamp() });
return findByStartTimeStamp(mysqlConnection, newStartTimestamp);
}
}
}
Example 9
| Source File: MysqlEventParser.java From canal with Apache License 2.0 | 4 votes |
|
private Long findTransactionBeginPosition(ErosaConnection mysqlConnection, final EntryPosition entryPosition)
throws IOException {
// 针对开始的第一条为非Begin记录，需要从该binlog扫描
final java.util.concurrent.atomic.AtomicLong preTransactionStartPosition = new java.util.concurrent.atomic.AtomicLong(0L);
mysqlConnection.reconnect();
mysqlConnection.seek(entryPosition.getJournalName(), 4L, entryPosition.getGtid(), new SinkFunction<LogEvent>() {
private LogPosition lastPosition;
public boolean sink(LogEvent event) {
try {
CanalEntry.Entry entry = parseAndProfilingIfNecessary(event, true);
if (entry == null) {
return true;
}
// 直接查询第一条业务数据，确认是否为事务Begin
// 记录一下transaction begin position
if (entry.getEntryType() == CanalEntry.EntryType.TRANSACTIONBEGIN
&& entry.getHeader().getLogfileOffset() < entryPosition.getPosition()) {
preTransactionStartPosition.set(entry.getHeader().getLogfileOffset());
}
if (entry.getHeader().getLogfileOffset() >= entryPosition.getPosition()) {
return false;// 退出
}
lastPosition = buildLastPosition(entry);
} catch (Exception e) {
processSinkError(e, lastPosition, entryPosition.getJournalName(), entryPosition.getPosition());
return false;
}
return running;
}
});
// 判断一下找到的最接近position的事务头的位置
if (preTransactionStartPosition.get() > entryPosition.getPosition()) {
logger.error("preTransactionEndPosition greater than startPosition from zk or localconf, maybe lost data");
throw new CanalParseException("preTransactionStartPosition greater than startPosition from zk or localconf, maybe lost data");
}
return preTransactionStartPosition.get();
}
