Examples with Position com.alibaba.otter.canal.protocol.position.Position used on opensource projects

Example 6 with Position

use of com.alibaba.otter.canal.protocol.position.Position in project canal by alibaba.

the class CanalServerWithEmbedded method subscribe.

/**
     * 客户端订阅，重复订阅时会更新对应的filter信息
     */
@Override
public void subscribe(ClientIdentity clientIdentity) throws CanalServerException {
    checkStart(clientIdentity.getDestination());
    CanalInstance canalInstance = canalInstances.get(clientIdentity.getDestination());
    if (!canalInstance.getMetaManager().isStart()) {
        canalInstance.getMetaManager().start();
    }
    // 执行一下meta订阅
    canalInstance.getMetaManager().subscribe(clientIdentity);
    Position position = canalInstance.getMetaManager().getCursor(clientIdentity);
    if (position == null) {
        // 获取一下store中的第一条
        position = canalInstance.getEventStore().getFirstPosition();
        if (position != null) {
            // 更新一下cursor
            canalInstance.getMetaManager().updateCursor(clientIdentity, position);
        }
        logger.info("subscribe successfully, {} with first position:{} ", clientIdentity, position);
    } else {
        logger.info("subscribe successfully, use last cursor position:{} ", clientIdentity, position);
    }
    // 通知下订阅关系变化
    canalInstance.subscribeChange(clientIdentity);
}

Example 7 with Position

use of com.alibaba.otter.canal.protocol.position.Position in project canal by alibaba.

the class AbstractCanalStoreScavenge method scavenge.

public void scavenge() {
    Position position = getLatestAckPosition(destination);
    cleanUntil(position);
}

Example 8 with Position

use of com.alibaba.otter.canal.protocol.position.Position in project canal by alibaba.

the class MemoryEventStoreMemBatchTest method testAck.

@Test
public void testAck() {
    int bufferSize = 16;
    MemoryEventStoreWithBuffer eventStore = new MemoryEventStoreWithBuffer();
    eventStore.setBufferSize(bufferSize);
    eventStore.setBatchMode(BatchMode.MEMSIZE);
    eventStore.start();
    for (int i = 0; i < bufferSize / 2; i++) {
        boolean result = eventStore.tryPut(buildEvent("1", 1L, 1L + i));
        sleep(100L);
        Assert.assertTrue(result);
    }
    sleep(50L);
    Position first = eventStore.getFirstPosition();
    Position lastest = eventStore.getLatestPosition();
    Assert.assertEquals(first, CanalEventUtils.createPosition(buildEvent("1", 1L, 1L)));
    Assert.assertEquals(lastest, CanalEventUtils.createPosition(buildEvent("1", 1L, 1L + bufferSize / 2 - 1)));
    System.out.println("start get");
    Events<Event> entrys1 = eventStore.tryGet(first, bufferSize);
    System.out.println("first get size : " + entrys1.getEvents().size());
    eventStore.cleanUntil(entrys1.getPositionRange().getEnd());
    sleep(50L);
    // 继续造数据
    for (int i = bufferSize / 2; i < bufferSize; i++) {
        boolean result = eventStore.tryPut(buildEvent("1", 1L, 1L + i));
        sleep(100L);
        Assert.assertTrue(result);
    }
    Events<Event> entrys2 = eventStore.tryGet(entrys1.getPositionRange().getEnd(), bufferSize);
    System.out.println("second get size : " + entrys2.getEvents().size());
    eventStore.rollback();
    entrys2 = eventStore.tryGet(entrys1.getPositionRange().getEnd(), bufferSize);
    System.out.println("after rollback get size : " + entrys2.getEvents().size());
    first = eventStore.getFirstPosition();
    lastest = eventStore.getLatestPosition();
    List<Event> entrys = new ArrayList<Event>(entrys2.getEvents());
    Assert.assertEquals(first, entrys2.getPositionRange().getStart());
    Assert.assertEquals(lastest, entrys2.getPositionRange().getEnd());
    Assert.assertEquals(first, CanalEventUtils.createPosition(entrys.get(0)));
    Assert.assertEquals(lastest, CanalEventUtils.createPosition(entrys.get(entrys.size() - 1)));
    // 全部ack掉
    eventStore.cleanUntil(entrys2.getPositionRange().getEnd());
    // 最后就拿不到数据
    Events<Event> entrys3 = eventStore.tryGet(entrys1.getPositionRange().getEnd(), bufferSize);
    System.out.println("third get size : " + entrys3.getEvents().size());
    Assert.assertEquals(0, entrys3.getEvents().size());
    eventStore.stop();
}

Example 9 with Position

use of com.alibaba.otter.canal.protocol.position.Position in project canal by alibaba.

the class MemoryEventStoreMemBatchTest method testOnePutOneGet.

@Test
public void testOnePutOneGet() {
    MemoryEventStoreWithBuffer eventStore = new MemoryEventStoreWithBuffer();
    eventStore.setBatchMode(BatchMode.MEMSIZE);
    eventStore.start();
    boolean result = eventStore.tryPut(buildEvent("1", 1L, 1L));
    Assert.assertTrue(result);
    Position position = eventStore.getFirstPosition();
    Events<Event> entrys = eventStore.tryGet(position, 1);
    Assert.assertTrue(entrys.getEvents().size() == 1);
    Assert.assertEquals(position, entrys.getPositionRange().getStart());
    Assert.assertEquals(position, entrys.getPositionRange().getEnd());
    eventStore.stop();
}

Example 10 with Position

use of com.alibaba.otter.canal.protocol.position.Position in project canal by alibaba.

the class MemoryEventStoreMemBatchTest method testFullPutBatchGet.

@Test
public void testFullPutBatchGet() {
    int bufferSize = 16;
    MemoryEventStoreWithBuffer eventStore = new MemoryEventStoreWithBuffer();
    eventStore.setBufferSize(bufferSize);
    eventStore.setBatchMode(BatchMode.MEMSIZE);
    eventStore.start();
    for (int i = 0; i < bufferSize; i++) {
        boolean result = eventStore.tryPut(buildEvent("1", 1L, 1L + i));
        sleep(100L);
        Assert.assertTrue(result);
    }
    Position first = eventStore.getFirstPosition();
    Position lastest = eventStore.getLatestPosition();
    Assert.assertEquals(first, CanalEventUtils.createPosition(buildEvent("1", 1L, 1L)));
    Assert.assertEquals(lastest, CanalEventUtils.createPosition(buildEvent("1", 1L, 1L + bufferSize - 1)));
    System.out.println("start get");
    Events<Event> entrys1 = eventStore.tryGet(first, bufferSize);
    System.out.println("first get size : " + entrys1.getEvents().size());
    Assert.assertTrue(entrys1.getEvents().size() == bufferSize);
    Assert.assertEquals(first, entrys1.getPositionRange().getStart());
    Assert.assertEquals(lastest, entrys1.getPositionRange().getEnd());
    Assert.assertEquals(first, CanalEventUtils.createPosition(entrys1.getEvents().get(0)));
    Assert.assertEquals(lastest, CanalEventUtils.createPosition(entrys1.getEvents().get(bufferSize - 1)));
    eventStore.stop();
}