private Header createHeader(
String binlogFile, LogHeader logHeader, String schemaName, String tableName) {
// header会做信息冗余,方便以后做检索或者过滤
Header.Builder headerBuilder = Header.newBuilder();
headerBuilder.setVersion(version);
headerBuilder.setLogfileName(binlogFile);
headerBuilder.setLogfileOffset(logHeader.getLogPos() - logHeader.getEventLen());
headerBuilder.setServerId(logHeader.getServerId());
headerBuilder.setServerenCode(UTF_8); // 经过java输出后所有的编码为unicode
headerBuilder.setExecuteTime(logHeader.getWhen() * 1000L);
headerBuilder.setSourceType(Type.MYSQL);
if (schemaName != null) {
headerBuilder.setSchemaName(StringUtils.lowerCase(schemaName));
}
if (tableName != null) {
headerBuilder.setTableName(StringUtils.lowerCase(tableName));
}
headerBuilder.setEventLength(logHeader.getEventLen());
return headerBuilder.build();
}
/**
* The total size of this event, in bytes. In other words, this is the sum of the sizes of
* Common-Header, Post-Header, and Body.
*/
public final int getEventLen() {
return header.getEventLen();
}