TableStore：多行数据操作

1、批量写

public static void batchWriteRow(SyncClient client) {
    BatchWriteRowRequest request = new BatchWriteRowRequest();

    //RowPut
    PrimaryKeyBuilder primaryKeyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(99));
    RowPutChange rowPutChange = new RowPutChange("note",primaryKeyBuilder.build());
    //添加一些列
    rowPutChange.addColumn(new Column("intattr", ColumnValue.fromLong(123)));
    rowPutChange.addColumn(new Column("strattr", ColumnValue.fromString("string 1"), System.currentTimeMillis()));
    rowPutChange.addColumn(new Column("strattr", ColumnValue.fromString("string 23345"),System.currentTimeMillis() + 10));
    request.addRowChange(rowPutChange);

    //RowDelete
    PrimaryKeyBuilder primaryKeyBuilder2 = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder2.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(2));
    RowDeleteChange rowDeleteChange = new RowDeleteChange("note",primaryKeyBuilder2.build());
    request.addRowChange(rowDeleteChange);

    //RowUpdate
    PrimaryKeyBuilder primaryKeyBuilder3 = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder3.addPrimaryKeyColumn("noteid",PrimaryKeyValue.fromLong(1));
    RowUpdateChange rowUpdateChange = new RowUpdateChange("note", primaryKeyBuilder3.build());
    rowUpdateChange.put("day",ColumnValue.fromString("修改后的day"));    rowUpdateChange.deleteColumns("month");
    request.addRowChange(rowUpdateChange);

    //另一个表的RowPut
    PrimaryKeyBuilder keyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    keyBuilder.addPrimaryKeyColumn("userid",PrimaryKeyValue.fromLong(20));
    keyBuilder.addPrimaryKeyColumn("userguid",PrimaryKeyValue.fromString("121212323"));
    keyBuilder.addPrimaryKeyColumn("userauto",PrimaryKeyValue.AUTO_INCREMENT);
    RowPutChange rowPutChange2 = new RowPutChange("user", keyBuilder.build());
    request.addRowChange(rowPutChange2);

    BatchWriteRowResponse batchWriteRowResponse = client.batchWriteRow(request);

    System.out.println("是否全部成功：" + batchWriteRowResponse.isAllSucceed());
    if(!batchWriteRowResponse.isAllSucceed()) {
        for(RowResult rowResult : batchWriteRowResponse.getFailedRows()) {
            System.out.println("失败的行：" + request.getRowChange(rowResult.getTableName(),rowResult.getIndex()).getPrimaryKey());
                        System.out.println("失败原因：" + rowResult.getError());
        }
    }

    //可以通过createRequestForRetry方法再构造一个请求对失败的行进行重试.这里只给出构造重试请求的部分.
    //推荐的重试方法是使用SDK的自定义重试策略功能, 支持对batch操作的部分行错误进行重试. 设定重试策略后, 调用接口处即不需要增加重试代码.
    //BatchWriteRowRequest retryRequest = request.createRequestForRetry(batchWriteRowResponse.getFailedRows());
}

2、批量读

private static void batchGetRow(SyncClient client) {
    BatchGetRowRequest batchGetRowRequest = new BatchGetRowRequest();

    MultiRowQueryCriteria multiRowQueryCriteria = new MultiRowQueryCriteria("note");
    // 加入要读的行
    PrimaryKeyBuilder keyBuilder1 = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    keyBuilder1.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(1));
    PrimaryKey key1 = keyBuilder1.build();

    PrimaryKeyBuilder keyBuilder2 = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    keyBuilder2.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(99));
    PrimaryKey key2 = keyBuilder2.build();
    multiRowQueryCriteria.addRow(key1);
    multiRowQueryCriteria.addRow(key2);
    // 添加条件
    multiRowQueryCriteria.setMaxVersions(1);
    String[] colsStrings = { "noteid", "day", "year" };
    multiRowQueryCriteria.addColumnsToGet(colsStrings);
    SingleColumnValueFilter singleColumnValueFilter = new SingleColumnValueFilter("year",
            SingleColumnValueFilter.CompareOperator.EQUAL, ColumnValue.fromLong(2019));
    singleColumnValueFilter.setPassIfMissing(false);
    multiRowQueryCriteria.setFilter(singleColumnValueFilter);
    batchGetRowRequest.addMultiRowQueryCriteria(multiRowQueryCriteria);

    MultiRowQueryCriteria multiRowQueryCriteria2 = new MultiRowQueryCriteria("testdb");
    multiRowQueryCriteria2.setMaxVersions(1);
    PrimaryKeyBuilder keyBuilder3 = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    keyBuilder3.addPrimaryKeyColumn("testid", PrimaryKeyValue.fromLong(1));
    PrimaryKey key3 = keyBuilder3.build();
    multiRowQueryCriteria2.addRow(key3);
    batchGetRowRequest.addMultiRowQueryCriteria(multiRowQueryCriteria2);

    BatchGetRowResponse batchGetRowResponse = client.batchGetRow(batchGetRowRequest);

    System.out.println("是否全部成功：" + batchGetRowResponse.isAllSucceed());
    if (!batchGetRowResponse.isAllSucceed()) {
        for (RowResult rowResult : batchGetRowResponse.getFailedRows()) {
            System.out.println(
                    "失败的行：" + batchGetRowRequest.getPrimaryKey(rowResult.getTableName(), rowResult.getIndex()));
            System.out.println("失败原因：" + rowResult.getError());
        }
    }

    List<RowResult> results = batchGetRowResponse.getSucceedRows();
    for (RowResult rowResult : results) {
        Row row = rowResult.getRow();
        if (row != null) {
            Column[] columns = row.getColumns();
            for (Column column : columns) {
                System.out.println("Name:" + column.getName() + " Value:" + column.getValue() + "\n");
            }
        }
    }

    List<RowResult> results1 = batchGetRowResponse.getBatchGetRowResult("note");
    for (RowResult rowResult : results1) {
        Row row = rowResult.getRow();
        if (row != null) {
            Column[] columns = row.getColumns();
            for (Column column : columns) {
                System.out.println("Name:" + column.getName() + " Value:" + column.getValue() + "\n");
            }
        }
    }

    List<RowResult> results2 = batchGetRowResponse.getBatchGetRowResult("testdb");
    for (RowResult rowResult : results2) {
        Row row = rowResult.getRow();        if (row != null) {
            Column[] columns = row.getColumns();
            for (Column column : columns) {
                System.out.println("Name:" + column.getName() + " Value:" + column.getValue() + "\n");
            }
        }
    }

    // 可以通过createRequestForRetry方法再构造一个请求对失败的行进行重试.这里只给出构造重试请求的部分.
    // 推荐的重试方法是使用SDK的自定义重试策略功能, 支持对batch操作的部分行错误进行重试. 设定重试策略后, 调用接口处即不需要增加重试代码.
    // BatchGetRowRequest retryRequest =
    // batchGetRowRequest.createRequestForRetry(batchGetRowResponse.getFailedRows());

}

因为不通过条件的查询都会返回null，务必记得对Row做null检查。

3、范围读

设置起止主键，查找此范围内的数据，当数据量过大无法一次读取完时，会返回下一个主键位置，接着读取。

public static void getRange(SyncClient client) throws IOException {
    RangeRowQueryCriteria rangeRowQueryCriteria = new RangeRowQueryCriteria("note");

    //设置起始主键
    PrimaryKeyBuilder primaryKeyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(20));
    rangeRowQueryCriteria.setInclusiveStartPrimaryKey(primaryKeyBuilder.build());

    //设置结果主键
    primaryKeyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(1));
    rangeRowQueryCriteria.setExclusiveEndPrimaryKey(primaryKeyBuilder.build());
    //反序读
    rangeRowQueryCriteria.setDirection(Direction.BACKWARD);

    rangeRowQueryCriteria.setMaxVersions(1);
    while (true) {
        GetRangeResponse getRangeResponse = client.getRange(new GetRangeRequest(rangeRowQueryCriteria));
        for(Row row : getRangeResponse.getRows()) {
            PrimaryKeyColumn[] pks = row.getPrimaryKey().getPrimaryKeyColumns();
            Column pkColumn = pks[0].toColumn();
            System.out.println("noteid:" + pkColumn.getValue());

            Column[] columns = row.getColumns();
            for(Column column : columns) {
                System.out.println(" Name:" + column.getName() + " Value:" + column.getValue());
            }
        }

        if(getRangeResponse.getNextStartPrimaryKey() != null) {
            System.out.println("--------nextStartPrimaryKey不为空，则继续读取---------");
            rangeRowQueryCriteria.setInclusiveStartPrimaryKey(getRangeResponse.getNextStartPrimaryKey());
        }else {
            break;
        }
    }
}

4、迭代读

public static void getRangeByIterator(SyncClient client) throws IOException {
    RangeIteratorParameter rangeIteratorParameter = new RangeIteratorParameter("note");

    //设置起始主键
    PrimaryKeyBuilder primaryKeyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(20));
    rangeIteratorParameter.setInclusiveStartPrimaryKey(primaryKeyBuilder.build());

    //设置结果主键
    primaryKeyBuilder = PrimaryKeyBuilder.createPrimaryKeyBuilder();
    primaryKeyBuilder.addPrimaryKeyColumn("noteid", PrimaryKeyValue.fromLong(1));
    rangeIteratorParameter.setExclusiveEndPrimaryKey(primaryKeyBuilder.build());

    rangeIteratorParameter.setDirection(Direction.BACKWARD);

    rangeIteratorParameter.setMaxVersions(1);

    Iterator<Row> iterator = client.createRangeIterator(rangeIteratorParameter);
    while (iterator.hasNext()) {
        Row row = iterator.next();

        PrimaryKeyColumn[] pks = row.getPrimaryKey().getPrimaryKeyColumns();
        Column pkColumn = pks[0].toColumn();
        System.out.println("noteid:" + pkColumn.getValue());

        Column[] columns = row.getColumns();
        for(Column column : columns) {
            System.out.println(" Name:" + column.getName() + " Value:" + column.getValue());
        }

    }
}