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| 1 | +package examples; |
| 2 | + |
| 3 | +import com.aliyun.openservices.ots.*; |
| 4 | +import com.aliyun.openservices.ots.internal.OTSAlwaysRetryStrategy; |
| 5 | +import com.aliyun.openservices.ots.internal.OTSCallback; |
| 6 | +import com.aliyun.openservices.ots.internal.OTSDefaultRetryStrategy; |
| 7 | +import com.aliyun.openservices.ots.internal.writer.WriterConfig; |
| 8 | +import com.aliyun.openservices.ots.model.*; |
| 9 | + |
| 10 | +import java.util.ArrayList; |
| 11 | +import java.util.Iterator; |
| 12 | +import java.util.List; |
| 13 | +import java.util.concurrent.Executor; |
| 14 | +import java.util.concurrent.ExecutorService; |
| 15 | +import java.util.concurrent.Executors; |
| 16 | +import java.util.concurrent.TimeUnit; |
| 17 | +import java.util.concurrent.atomic.AtomicLong; |
| 18 | + |
| 19 | +public class OTSWriterSample { |
| 20 | + private static final String COLUMN_GID_NAME = "gid"; |
| 21 | + private static final String COLUMN_UID_NAME = "uid"; |
| 22 | + final private static String endPoint = ""; |
| 23 | + final private static String accessId = ""; |
| 24 | + final private static String accessKey = ""; |
| 25 | + final private static String instanceName = ""; |
| 26 | + |
| 27 | + |
| 28 | + public static void main(String args[]) { |
| 29 | + |
| 30 | + OTSClient client = new OTSClient(endPoint, accessId, accessKey, |
| 31 | + instanceName); |
| 32 | + final String tableName = "sampleTable"; |
| 33 | + |
| 34 | + try { |
| 35 | + // 创建表 |
| 36 | + createTable(client, tableName); |
| 37 | + |
| 38 | + writeRow(tableName); |
| 39 | + |
| 40 | + scanTable(client, tableName); |
| 41 | + |
| 42 | + //deleteTable(client, tableName); |
| 43 | + |
| 44 | + } catch (ServiceException e) { |
| 45 | + System.err.println("操作失败，详情：" + e.getMessage()); |
| 46 | + // 可以根据错误代码做出处理， OTS的ErrorCode定义在OTSErrorCode中。 |
| 47 | + if (OTSErrorCode.QUOTA_EXHAUSTED.equals(e.getErrorCode())) { |
| 48 | + System.err.println("超出存储配额。"); |
| 49 | + } |
| 50 | + // Request ID可以用于有问题时联系客服诊断异常。 |
| 51 | + System.err.println("Request ID:" + e.getRequestId()); |
| 52 | + } catch (ClientException e) { |
| 53 | + // 可能是网络不好或者是返回结果有问题 |
| 54 | + System.err.println("请求失败，详情：" + e.getMessage()); |
| 55 | + } catch (InterruptedException e) { |
| 56 | + System.err.print(e); |
| 57 | + } |
| 58 | + client.shutdown(); |
| 59 | + } |
| 60 | + |
| 61 | + private static void scanTable(OTSClient client, String tableName) { |
| 62 | + RangeIteratorParameter param = new RangeIteratorParameter(tableName); |
| 63 | + RowPrimaryKey startKey = new RowPrimaryKey(); |
| 64 | + startKey.addPrimaryKeyColumn(COLUMN_GID_NAME, PrimaryKeyValue.INF_MIN); |
| 65 | + startKey.addPrimaryKeyColumn(COLUMN_UID_NAME, PrimaryKeyValue.INF_MIN); |
| 66 | + |
| 67 | + RowPrimaryKey endKey = new RowPrimaryKey(); |
| 68 | + endKey.addPrimaryKeyColumn(COLUMN_GID_NAME, PrimaryKeyValue.INF_MAX); |
| 69 | + endKey.addPrimaryKeyColumn(COLUMN_UID_NAME, PrimaryKeyValue.INF_MAX); |
| 70 | + |
| 71 | + param.setInclusiveStartPrimaryKey(startKey); |
| 72 | + param.setExclusiveEndPrimaryKey(endKey); |
| 73 | + |
| 74 | + Iterator<Row> rowIter = client.createRangeIterator(param); |
| 75 | + int totalCount = 0; |
| 76 | + while (rowIter.hasNext()) { |
| 77 | + rowIter.next(); |
| 78 | + totalCount++; |
| 79 | + } |
| 80 | + |
| 81 | + System.out.println("TotalRows in table: " + totalCount); |
| 82 | + } |
| 83 | + |
| 84 | + private static void createTable(OTSClient client, String tableName) |
| 85 | + throws ServiceException, ClientException { |
| 86 | + TableMeta tableMeta = new TableMeta(tableName); |
| 87 | + tableMeta.addPrimaryKeyColumn(COLUMN_GID_NAME, PrimaryKeyType.INTEGER); |
| 88 | + tableMeta.addPrimaryKeyColumn(COLUMN_UID_NAME, PrimaryKeyType.INTEGER); |
| 89 | + // 将该表的读写CU都设置为0 |
| 90 | + CapacityUnit capacityUnit = new CapacityUnit(0, 0); |
| 91 | + |
| 92 | + CreateTableRequest request = new CreateTableRequest(); |
| 93 | + request.setTableMeta(tableMeta); |
| 94 | + request.setReservedThroughput(capacityUnit); |
| 95 | + client.createTable(request); |
| 96 | + |
| 97 | + System.out.println("表已创建"); |
| 98 | + } |
| 99 | + |
| 100 | + private static void deleteTable(OTSClient client, String tableName) |
| 101 | + throws ServiceException, ClientException { |
| 102 | + DeleteTableRequest request = new DeleteTableRequest(); |
| 103 | + request.setTableName(tableName); |
| 104 | + client.deleteTable(request); |
| 105 | + |
| 106 | + System.out.println("表已删除"); |
| 107 | + } |
| 108 | + |
| 109 | + private static void writeRow(String tableName) throws InterruptedException { |
| 110 | + ClientConfiguration cc = new ClientConfiguration(); |
| 111 | + OTSServiceConfiguration osc = new OTSServiceConfiguration(); |
| 112 | + osc.setRetryStrategy(new OTSDefaultRetryStrategy()); // 可定制重试策略，若需要保证数据写入成功率，可采用更激进的重试策略 |
| 113 | + OTSClientAsync asyncClient = new OTSClientAsync(endPoint, accessId, accessKey, instanceName, cc, osc); |
| 114 | + |
| 115 | + // 初始化 |
| 116 | + WriterConfig config = new WriterConfig(); |
| 117 | + config.setMaxBatchSize(1024 * 1024); // 配置一次批量导入请求的大小限制，默认是1MB |
| 118 | + config.setMaxColumnsCount(128); // 配置一行的列数的上限，默认128列 |
| 119 | + config.setBufferSize(1024); // 配置内存中最多缓冲的数据行数，默认1024行，必须是2的指数倍 |
| 120 | + config.setMaxBatchRowsCount(100); // 配置一次批量导入的行数上限，默认100 |
| 121 | + config.setConcurrency(10); // 配置最大并发数，默认10 |
| 122 | + config.setMaxAttrColumnSize(64 * 1024); // 配置属性列的值大小上限，默认是64KB |
| 123 | + config.setMaxPKColumnSize(1024); // 配置主键列的值大小上限，默认1KB |
| 124 | + config.setFlushInterval(10000); // 配置缓冲区flush的时间间隔，默认10s |
| 125 | + |
| 126 | + // 配置一个callback，OTSWriter通过该callback反馈哪些导入成功，哪些行导入失败，该callback只简单的统计写入成功和失败的行数。 |
| 127 | + |
| 128 | + AtomicLong succeedCount = new AtomicLong(); |
| 129 | + AtomicLong failedCount = new AtomicLong(); |
| 130 | + OTSCallback<RowChange, ConsumedCapacity> callback = new SampleCallback(succeedCount, failedCount); |
| 131 | + ExecutorService executor = Executors.newFixedThreadPool(2); |
| 132 | + OTSWriter otsWriter = new DefaultOTSWriter(asyncClient, tableName, config, callback, executor); |
| 133 | + |
| 134 | + // 起多个线程，并发的导入数据 |
| 135 | + int threadCount = 10; |
| 136 | + int rowsCount = 10000; |
| 137 | + List<Thread> threads = new ArrayList<Thread>(); |
| 138 | + for (int i = 0; i < threadCount; i++) { |
| 139 | + WriteRow writeRow = new WriteRow(i, tableName, otsWriter, rowsCount); |
| 140 | + threads.add(new Thread(writeRow)); |
| 141 | + } |
| 142 | + |
| 143 | + for (Thread thread : threads) { |
| 144 | + thread.start(); |
| 145 | + } |
| 146 | + |
| 147 | + for (Thread thread : threads) { |
| 148 | + thread.join(); |
| 149 | + } |
| 150 | + |
| 151 | + // 所有压力线程完成后，等待OTSWriter将数据导入完毕 |
| 152 | + otsWriter.flush(); |
| 153 | + |
| 154 | + // 所有数据导入完毕后，需要显式的将OTSWriter给close掉 |
| 155 | + otsWriter.close(); |
| 156 | + |
| 157 | + // 最终关闭ots client |
| 158 | + asyncClient.shutdown(); |
| 159 | + |
| 160 | + // 关闭executor thread pool |
| 161 | + executor.shutdown(); |
| 162 | + executor.awaitTermination(10, TimeUnit.SECONDS); |
| 163 | + |
| 164 | + System.out.println("成功导入行数: " + succeedCount); |
| 165 | + System.out.println("失败导入行数: " + failedCount); |
| 166 | + } |
| 167 | + |
| 168 | + private static class WriteRow implements Runnable { |
| 169 | + private int id; |
| 170 | + private String tableName; |
| 171 | + private OTSWriter writer; |
| 172 | + private int rowsCount; |
| 173 | + |
| 174 | + public WriteRow(int id, String tableName, OTSWriter writer, int rowsCount) { |
| 175 | + this.id = id; |
| 176 | + this.tableName = tableName; |
| 177 | + this.writer = writer; |
| 178 | + this.rowsCount = rowsCount; |
| 179 | + } |
| 180 | + |
| 181 | + @Override |
| 182 | + public void run() { |
| 183 | + int start = id * rowsCount; |
| 184 | + for (int i = 0; i < rowsCount; i++) { |
| 185 | + RowPrimaryKey primaryKey = new RowPrimaryKey(); |
| 186 | + primaryKey.addPrimaryKeyColumn(COLUMN_GID_NAME, PrimaryKeyValue.fromLong(start + i)); |
| 187 | + primaryKey.addPrimaryKeyColumn(COLUMN_UID_NAME, PrimaryKeyValue.fromLong(start + i)); |
| 188 | + |
| 189 | + RowPutChange rowChange = new RowPutChange(tableName); |
| 190 | + rowChange.setPrimaryKey(primaryKey); |
| 191 | + rowChange.addAttributeColumn("col1", ColumnValue.fromBoolean(true)); |
| 192 | + rowChange.addAttributeColumn("col2", ColumnValue.fromLong(10)); |
| 193 | + rowChange.addAttributeColumn("col3", ColumnValue.fromString("Hello world.")); |
| 194 | + |
| 195 | + writer.addRowChange(rowChange); |
| 196 | + } |
| 197 | + } |
| 198 | + } |
| 199 | + |
| 200 | + private static class SampleCallback implements OTSCallback<RowChange, ConsumedCapacity> { |
| 201 | + private AtomicLong succeedCount; |
| 202 | + private AtomicLong failedCount; |
| 203 | + |
| 204 | + public SampleCallback(AtomicLong succeedCount, AtomicLong failedCount) { |
| 205 | + this.succeedCount = succeedCount; |
| 206 | + this.failedCount = failedCount; |
| 207 | + } |
| 208 | + |
| 209 | + @Override |
| 210 | + public void onCompleted(OTSContext<RowChange, ConsumedCapacity> otsContext) { |
| 211 | + succeedCount.incrementAndGet(); |
| 212 | + } |
| 213 | + |
| 214 | + @Override |
| 215 | + public void onFailed(OTSContext<RowChange, ConsumedCapacity> otsContext, OTSException ex) { |
| 216 | + ex.printStackTrace(); |
| 217 | + failedCount.incrementAndGet(); |
| 218 | + } |
| 219 | + |
| 220 | + @Override |
| 221 | + public void onFailed(OTSContext<RowChange, ConsumedCapacity> otsContext, ClientException ex) { |
| 222 | + ex.printStackTrace(); |
| 223 | + failedCount.incrementAndGet(); |
| 224 | + } |
| 225 | + } |
| 226 | +} |
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