Examples with Cmp io.etcd.jetcd.op.Cmp used on opensource projects

Example 6 with Cmp

use of io.etcd.jetcd.op.Cmp in project jetcd by coreos.

the class KVNamespaceTest method testNestedTxn.

@Test
public void testNestedTxn() throws Exception {
    // kvClient without namespace used as the judge for the final result
    kvClient = TestUtil.client(cluster).build().getKVClient();
    // kvClient with one namespace used to test operations with namespace
    ByteSequence namespace = ByteSequence.from(TestUtil.randomByteSequence().concat(ByteSequence.NAMESPACE_DELIMITER).getBytes());
    kvClientWithNamespace = TestUtil.client(cluster).namespace(namespace).build().getKVClient();
    ByteSequence cmpKey1 = getNonexistentKey();
    putKVWithAssertion(kvClient, cmpKey1, TestUtil.randomByteSequence(), null);
    ByteSequence cmpKey2 = getNonexistentKey();
    putKVWithAssertion(kvClientWithNamespace, cmpKey2, TestUtil.randomByteSequence(), null);
    ByteSequence key1 = getNonexistentKey();
    ByteSequence value1 = TestUtil.randomByteSequence();
    putKVWithAssertion(kvClientWithNamespace, key1, value1, null);
    ByteSequence key2 = getNonexistentKey();
    ByteSequence value2 = TestUtil.randomByteSequence();
    putKVWithAssertion(kvClientWithNamespace, key2, value2, null);
    {
        Txn txn = kvClientWithNamespace.txn();
        ByteSequence nextValue1 = TestUtil.randomByteSequence();
        CompletableFuture<TxnResponse> txnFuture = txn.If(new Cmp(cmpKey1, Cmp.Op.EQUAL, CmpTarget.version(0))).Then(Op.txn(new Cmp[] { new Cmp(cmpKey2, Cmp.Op.GREATER, CmpTarget.version(0)) }, new Op[] { Op.put(key1, nextValue1, PutOption.newBuilder().withPrevKV().build()) }, new Op[] { Op.put(key2, TestUtil.randomByteSequence(), PutOption.newBuilder().withPrevKV().build()) })).Else(Op.txn(new Cmp[] { new Cmp(cmpKey2, Cmp.Op.GREATER, CmpTarget.version(0)) }, new Op[] { Op.put(key2, TestUtil.randomByteSequence(), PutOption.newBuilder().withPrevKV().build()) }, new Op[] { Op.put(key1, TestUtil.randomByteSequence(), PutOption.newBuilder().withPrevKV().build()) })).commit();
        TxnResponse response = txnFuture.get();
        assertThat(response.getTxnResponses().size()).isEqualTo(1);
        assertThat(response.getTxnResponses().get(0).getPutResponses().size()).isEqualTo(1);
        assertThat(response.getTxnResponses().get(0).getPutResponses().get(0).hasPrevKv()).isTrue();
        assertThat(response.getTxnResponses().get(0).getPutResponses().get(0).getPrevKv().getKey()).isEqualTo(key1);
        assertThat(response.getTxnResponses().get(0).getPutResponses().get(0).getPrevKv().getValue()).isEqualTo(value1);
        value1 = nextValue1;
        assertExistentKey(kvClient, ByteSequence.from(namespace.concat(key1).getBytes()), value1);
    }
}