private boolean checkNeedDbForRowMode(Pipeline pipeline, EventData eventData) {
// 获取数据表信息
DataMedia dataMedia = ConfigHelper.findDataMedia(pipeline, eventData.getTableId());
DbDialect dbDialect =
dbDialectFactory.getDbDialect(pipeline.getId(), (DbMediaSource) dataMedia.getSource());
Table table = dbDialect.findTable(eventData.getSchemaName(), eventData.getTableName());
if (table.getColumnCount() == eventData.getColumns().size() + eventData.getKeys().size()) {
return false;
} else {
return true;
}
}
private List<String> select(
DbDialect dbDialect,
String schemaName,
String tableName,
TableData keyTableData,
TableData columnTableData)
throws InterruptedException {
String selectSql =
dbDialect
.getSqlTemplate()
.getSelectSql(
schemaName, tableName, keyTableData.columnNames, columnTableData.columnNames);
Exception exception = null;
for (int i = 0; i < retryTimes; i++) {
if (Thread.currentThread().isInterrupted()) {
throw new InterruptedException(); // 退出
}
try {
List<List<String>> result =
dbDialect
.getJdbcTemplate()
.query(
selectSql,
keyTableData.columnValues,
keyTableData.columnTypes,
new RowDataMapper(columnTableData.columnTypes));
if (CollectionUtils.isEmpty(result)) {
logger.warn(
"the mediaName = {}.{} not has rowdate in db \n {}",
new Object[] {schemaName, tableName, dumpEventData(eventData, selectSql)});
return null;
} else {
return result.get(0);
}
} catch (Exception e) {
exception = e;
logger.warn("retry [" + (i + 1) + "] failed", e);
}
}
throw new RuntimeException(
"db extract failed , data:\n " + dumpEventData(eventData, selectSql), exception);
}
public void run() {
try {
MDC.put(OtterConstants.splitPipelineLogFileKey, String.valueOf(pipeline.getId()));
Thread.currentThread()
.setName(String.format(WORKER_NAME_FORMAT, pipeline.getId(), pipeline.getName()));
// 获取数据表信息
DataMedia dataMedia = ConfigHelper.findDataMedia(pipeline, eventData.getTableId());
DbDialect dbDialect =
dbDialectFactory.getDbDialect(pipeline.getId(), (DbMediaSource) dataMedia.getSource());
Table table = dbDialect.findTable(eventData.getSchemaName(), eventData.getTableName());
TableData keyTableData = buildTableData(table, eventData.getKeys());
// oracle类型特殊处理下
if (dbDialect instanceof OracleDialect) {
keyTableData.columnTypes = getOraclePkTypes(table, keyTableData.columnNames);
}
boolean needAll =
pipeline.getParameters().getSyncMode().isRow()
|| (eventData.getSyncMode() != null && eventData.getSyncMode().isRow());
// 增加一种case, 针对oracle erosa有时侯结果记录只有主键，没有变更字段，需要做一次反查，获取所有字段
needAll |=
CollectionUtils.isEmpty(eventData.getUpdatedColumns())
&& dataMedia.getSource().getType().isOracle();
List<DataMediaPair> mediaParis =
ConfigHelper.findDataMediaPairByMediaId(pipeline, dataMedia.getId());
List<String> viewColumnNames =
buildMaxColumnsFromColumnPairs(mediaParis, eventData.getKeys());
// TODO 后续版本测试下
// if (needAll) {
// boolean needDb = checkNeedDbForRowMode(table,
// viewColumnNames, eventData);
// if (needAll && !needDb) {// 不需要进行反查
// item.setFilter(false);
// return;
// }
// }
// modified by ljh at 2012-11-04
// 反查数据时只反查带update=true标识的数据，因为update=false的记录可能只是进行filter需要用到的数据，不需要反查
TableData columnTableData =
buildTableData(table, eventData.getUpdatedColumns(), needAll, viewColumnNames);
if (columnTableData.columnNames.length == 0) {
// 全主键，不需要进行反查
} else {
List<String> newColumnValues =
select(
dbDialect,
eventData.getSchemaName(),
eventData.getTableName(),
keyTableData,
columnTableData);
if (newColumnValues == null) {
// miss from db
// 设置为filter=true，可能存在丢数据的风险.
// 比如针对源库发生主备切换，otter反查的是备库，查询不到对应的记录
// item.setFilter(true);
// 针对需要自定义反查数据库的，允许忽略
// a. 自由门触发的数据，不存在时可以忽略
// b. 回环补救算法触发的数据，不存在时可以忽略
boolean needFilter = eventData.isRemedy() || pipeline.getParameters().getSkipNoRow();
item.setFilter(needFilter);
// 判断主键是否有变更，如果变更了，就原样返回item
int index = 0;
for (EventColumn oldKey : eventData.getOldKeys()) {
if (!oldKey.equals(eventData.getKeys().get(index))) {
item.setFilter(false);
break;
}
}
} else {
// 构造反查的返回结果
List<EventColumn> newEventColumns = new ArrayList<EventColumn>();
for (int i = 0; i < newColumnValues.size(); i++) {
EventColumn column = new EventColumn();
column.setIndex(columnTableData.indexs[i]);
column.setColumnName(columnTableData.columnNames[i]);
column.setColumnType(columnTableData.columnTypes[i]);
column.setNull(newColumnValues.get(i) == null);
column.setColumnValue(newColumnValues.get(i));
column.setUpdate(true);
newEventColumns.add(column);
}
// 处理下columns中不在反查字段内的字段列表
for (EventColumn column : eventData.getColumns()) {
boolean override = false;
for (EventColumn newEventColumn : newEventColumns) {
if (StringUtils.equalsIgnoreCase(
newEventColumn.getColumnName(), column.getColumnName())) {
override = true;
break;
}
}
if (!override) { // 针对newcolumns不存在的记录进行添加
newEventColumns.add(column);
}
}
Collections.sort(newEventColumns, new EventColumnIndexComparable()); // 重新排个序
eventData.setColumns(newEventColumns);
}
}
} catch (InterruptedException e) {
// ignore
} finally {
Thread.currentThread().setName(WORKER_NAME);
MDC.remove(OtterConstants.splitPipelineLogFileKey);
}
}
