private Entry parserQueryEvent(QueryLogEvent event) {
String queryString = event.getQuery();
if (StringUtils.endsWithIgnoreCase(queryString, BEGIN)) {
TransactionBegin transactionBegin = createTransactionBegin(event.getExecTime());
Header header = createHeader(binlogFileName, event.getHeader(), "", "");
return createEntry(header, EntryType.TRANSACTIONBEGIN, transactionBegin.toByteString());
} else if (StringUtils.endsWithIgnoreCase(queryString, COMMIT)) {
TransactionEnd transactionEnd = createTransactionEnd(0L, event.getWhen()); // MyISAM可能不会有xid事件
Header header = createHeader(binlogFileName, event.getHeader(), "", "");
return createEntry(header, EntryType.TRANSACTIONEND, transactionEnd.toByteString());
} else {
// DDL语句处理
DdlResult result = SimpleDdlParser.parse(queryString, event.getDbName());
if (result == null) {
logger.warn(
"WARN ## sql = {} , position = {}:{} is not create table/alter table/drop table ddl sql,so will ignore",
new Object[] {
queryString,
binlogFileName,
event.getHeader().getLogPos() - event.getHeader().getEventLen()
});
return null;
}
String schemaName = event.getDbName();
if (StringUtils.isEmpty(schemaName) && StringUtils.isNotEmpty(result.getSchemaName())) {
schemaName = result.getSchemaName();
}
String tableName = result.getTableName();
if (tableMetaCache != null
&& (result.getType() == EventType.ALTER || result.getType() == EventType.ERASE)) {
if (StringUtils.isNotEmpty(tableName)) {
// 如果解析到了正确的表信息，则根据全名进行清除
tableMetaCache.clearTableMetaWithFullName(schemaName + "." + tableName);
} else {
// 如果无法解析正确的表信息，则根据schema进行清除
tableMetaCache.clearTableMetaWithSchemaName(schemaName);
}
}
Header header = createHeader(binlogFileName, event.getHeader(), schemaName, tableName);
RowChange.Builder rowChangeBuider = RowChange.newBuilder();
rowChangeBuider.setIsDdl(true);
rowChangeBuider.setSql(queryString);
rowChangeBuider.setEventType(result.getType());
return createEntry(header, EntryType.ROWDATA, rowChangeBuider.build().toByteString());
}
}
public void reset() {
// do nothing
binlogFileName = "mysql-bin.000001";
if (tableMetaCache != null) {
tableMetaCache.clearTableMeta();
}
}
private Entry parseRowsEvent(RowsLogEvent event) {
try {
TableMapLogEvent table = event.getTable();
if (table == null) {
// tableId对应的记录不存在
throw new TableIdNotFoundException("not found tableId:" + event.getTableId());
}
String fullname = getSchemaNameAndTableName(table);
if (nameFilter != null && !nameFilter.filter(fullname)) { // check name filter
return null;
}
Header header =
createHeader(binlogFileName, event.getHeader(), table.getDbName(), table.getTableName());
RowChange.Builder rowChangeBuider = RowChange.newBuilder();
rowChangeBuider.setTableId(event.getTableId());
rowChangeBuider.setIsDdl(false);
EventType eventType = null;
int type = event.getHeader().getType();
if (LogEvent.WRITE_ROWS_EVENT_V1 == type || LogEvent.WRITE_ROWS_EVENT == type) {
eventType = EventType.INSERT;
} else if (LogEvent.UPDATE_ROWS_EVENT_V1 == type || LogEvent.UPDATE_ROWS_EVENT == type) {
eventType = EventType.UPDATE;
} else if (LogEvent.DELETE_ROWS_EVENT_V1 == type || LogEvent.DELETE_ROWS_EVENT == type) {
eventType = EventType.DELETE;
} else {
throw new CanalParseException("unsupport event type :" + event.getHeader().getType());
}
rowChangeBuider.setEventType(eventType);
RowsLogBuffer buffer = event.getRowsBuf(charset.name());
BitSet columns = event.getColumns();
BitSet changeColumns = event.getColumns();
TableMeta tableMeta = null;
if (tableMetaCache != null) { // 入错存在table meta cache
tableMeta = tableMetaCache.getTableMeta(fullname);
if (tableMeta == null) {
throw new CanalParseException("not found [" + fullname + "] in db , pls check!");
}
}
while (buffer.nextOneRow(columns)) {
// 处理row记录
RowData.Builder rowDataBuilder = RowData.newBuilder();
if (EventType.INSERT == eventType) {
// insert的记录放在before字段中
parseOneRow(rowDataBuilder, event, buffer, columns, true, tableMeta);
} else if (EventType.DELETE == eventType) {
// delete的记录放在before字段中
parseOneRow(rowDataBuilder, event, buffer, columns, false, tableMeta);
} else {
// update需要处理before/after
parseOneRow(rowDataBuilder, event, buffer, columns, false, tableMeta);
if (!buffer.nextOneRow(changeColumns)) {
rowChangeBuider.addRowDatas(rowDataBuilder.build());
break;
}
parseOneRow(rowDataBuilder, event, buffer, event.getChangeColumns(), true, tableMeta);
}
rowChangeBuider.addRowDatas(rowDataBuilder.build());
}
return createEntry(header, EntryType.ROWDATA, rowChangeBuider.build().toByteString());
} catch (Exception e) {
throw new CanalParseException("parse row data failed.", e);
}
}
