/** 判断两条记录是否可以作为一个batch提交，主要判断sql是否相等. 可优先通过schemaName进行判断 */
private boolean canBatch(EventData source, EventData target) {
// return StringUtils.equals(source.getSchemaName(), target.getSchemaName())
// && StringUtils.equals(source.getTableName(), target.getTableName())
// && StringUtils.equals(source.getSql(), target.getSql());
// return StringUtils.equals(source.getSql(), target.getSql());
// 因为sqlTemplate构造sql时用了String.intern()的操作，保证相同字符串的引用是同一个，所以可以直接使用==进行判断，提升效率
return source.getSql() == target.getSql();
}
// 大致估算一下row记录的大小
private long calculateSize(EventData data) {
// long size = 0L;
// size += data.getKeys().toString().getBytes().length - 12 - data.getKeys().size() + 1L;
// size += data.getColumns().toString().getBytes().length - 12 - data.getKeys().size() + 1L;
// return size;
// byte[] bytes = JsonUtils.marshalToByte(data);// 走序列化的方式快速计算一下大小
// return bytes.length;
return data.getSize(); // 数据不做计算，避免影响性能
}
private void processStat(EventData data, int affect, boolean batch) {
if (batch && (affect < 1 && affect != Statement.SUCCESS_NO_INFO)) {
failedDatas.add(data); // 记录到错误的临时队列，进行重试处理
} else if (!batch && affect < 1) {
failedDatas.add(data); // 记录到错误的临时队列，进行重试处理
} else {
processedDatas.add(data); // 记录到成功的临时队列，commit也可能会失败。所以这记录也可能需要进行重试
DbLoadCounter counter =
context.getCounters().get(Arrays.asList(data.getSchemaName(), data.getTableName()));
EventType type = data.getEventType();
if (type.isInsert()) {
counter.getInsertCount().incrementAndGet();
} else if (type.isUpdate()) {
counter.getUpdateCount().incrementAndGet();
} else if (type.isDelete()) {
counter.getDeleteCount().incrementAndGet();
}
counter.getRowSize().addAndGet(calculateSize(data));
}
}
private void doPreparedStatement(
PreparedStatement ps, DbDialect dbDialect, LobCreator lobCreator, EventData data)
throws SQLException {
EventType type = data.getEventType();
// 注意insert/update语句对应的字段数序都是将主键排在后面
List<EventColumn> columns = new ArrayList<EventColumn>();
if (type.isInsert()) {
columns.addAll(data.getColumns()); // insert为所有字段
columns.addAll(data.getKeys());
} else if (type.isDelete()) {
columns.addAll(data.getKeys());
} else if (type.isUpdate()) {
boolean existOldKeys = !CollectionUtils.isEmpty(data.getOldKeys());
columns.addAll(data.getUpdatedColumns()); // 只更新带有isUpdate=true的字段
columns.addAll(data.getKeys());
if (existOldKeys) {
columns.addAll(data.getOldKeys());
}
}
for (int i = 0; i < columns.size(); i++) {
int paramIndex = i + 1;
EventColumn column = columns.get(i);
int sqlType = column.getColumnType();
// 获取一下当前字段名的数据是否必填
Table table = dbDialect.findTable(data.getSchemaName(), data.getTableName());
Map<String, Boolean> isRequiredMap = new HashMap<String, Boolean>();
for (Column tableColumn : table.getColumns()) {
isRequiredMap.put(StringUtils.lowerCase(tableColumn.getName()), tableColumn.isRequired());
}
Boolean isRequired = isRequiredMap.get(StringUtils.lowerCase(column.getColumnName()));
if (isRequired == null) {
throw new ClaveException(
String.format(
"column name %s is not found in Table[%s]",
column.getColumnName(), table.toString()));
}
Object param =
SqlUtils.stringToSqlValue(
column.getColumnValue(), sqlType, isRequired, dbDialect.isEmptyStringNulled());
try {
switch (sqlType) {
case Types.CLOB:
lobCreator.setClobAsString(ps, paramIndex, (String) param);
break;
case Types.BLOB:
lobCreator.setBlobAsBytes(ps, paramIndex, (byte[]) param);
break;
default:
StatementCreatorUtils.setParameterValue(ps, paramIndex, sqlType, null, param);
break;
}
} catch (SQLException ex) {
logger.error(
"## SetParam error , [table={}, sqltype={}, value={}]",
new Object[] {data.getSchemaName() + "." + data.getTableName(), sqlType, param});
throw ex;
}
}
}