Examples with TopicMessageQuery com.hedera.hashgraph.sdk.TopicMessageQuery used on opensource projects

Example 1 with TopicMessageQuery

use of com.hedera.hashgraph.sdk.TopicMessageQuery in project hedera-sdk-java by hashgraph.

the class TopicMessageIntegrationTest method canReceiveATopicMessage.

@Test
@DisplayName("Can receive a topic message")
void canReceiveATopicMessage() throws Exception {
    var testEnv = new IntegrationTestEnv(1);
    var response = new TopicCreateTransaction().setAdminKey(testEnv.operatorKey).setTopicMemo("[e2e::TopicCreateTransaction]").execute(testEnv.client);
    var topicId = Objects.requireNonNull(response.getReceipt(testEnv.client).topicId);
    var info = new TopicInfoQuery().setTopicId(topicId).execute(testEnv.client);
    assertThat(info.topicId).isEqualTo(topicId);
    assertThat(info.topicMemo).isEqualTo("[e2e::TopicCreateTransaction]");
    assertThat(info.sequenceNumber).isEqualTo(0);
    assertThat(info.adminKey).isEqualTo(testEnv.operatorKey);
    Thread.sleep(3000);
    var receivedMessage = new boolean[] { false };
    var start = Instant.now();
    var handle = new TopicMessageQuery().setTopicId(topicId).setStartTime(Instant.EPOCH).subscribe(testEnv.client, (message) -> {
        receivedMessage[0] = new String(message.contents, StandardCharsets.UTF_8).equals("Hello, from HCS!");
    });
    Thread.sleep(3000);
    new TopicMessageSubmitTransaction().setTopicId(topicId).setMessage("Hello, from HCS!").execute(testEnv.client).getReceipt(testEnv.client);
    while (!receivedMessage[0]) {
        if (Duration.between(start, Instant.now()).compareTo(Duration.ofSeconds(60)) > 0) {
            throw new Exception("TopicMessage was not received in 60 seconds or less");
        }
        Thread.sleep(2000);
    }
    handle.unsubscribe();
    new TopicDeleteTransaction().setTopicId(topicId).execute(testEnv.client).getReceipt(testEnv.client);
    testEnv.close();
}

Example 2 with TopicMessageQuery

use of com.hedera.hashgraph.sdk.TopicMessageQuery in project hedera-sdk-java by hashgraph.

the class TopicMessageIntegrationTest method canReceiveALargeTopicMessage.

@Test
@DisplayName("Can receive a large topic message")
void canReceiveALargeTopicMessage() throws Exception {
    var testEnv = new IntegrationTestEnv(2);
    var response = new TopicCreateTransaction().setAdminKey(testEnv.operatorKey).setTopicMemo("[e2e::TopicCreateTransaction]").execute(testEnv.client);
    var topicId = Objects.requireNonNull(response.getReceipt(testEnv.client).topicId);
    Thread.sleep(5000);
    var info = new TopicInfoQuery().setTopicId(topicId).execute(testEnv.client);
    assertThat(info.topicId).isEqualTo(topicId);
    assertThat(info.topicMemo).isEqualTo("[e2e::TopicCreateTransaction]");
    assertThat(info.sequenceNumber).isEqualTo(0);
    assertThat(info.adminKey).isEqualTo(testEnv.operatorKey);
    var receivedMessage = new boolean[] { false };
    var start = Instant.now();
    var handle = new TopicMessageQuery().setTopicId(topicId).setStartTime(Instant.EPOCH).subscribe(testEnv.client, (message) -> {
        receivedMessage[0] = new String(message.contents, StandardCharsets.UTF_8).equals(Contents.BIG_CONTENTS);
    });
    new TopicMessageSubmitTransaction().setTopicId(topicId).setMessage(Contents.BIG_CONTENTS).execute(testEnv.client).getReceipt(testEnv.client);
    while (!receivedMessage[0]) {
        if (Duration.between(start, Instant.now()).compareTo(Duration.ofSeconds(60)) > 0) {
            throw new Exception("TopicMessage was not received in 60 seconds or less");
        }
        Thread.sleep(1000);
    }
    handle.unsubscribe();
    new TopicDeleteTransaction().setTopicId(topicId).execute(testEnv.client).getReceipt(testEnv.client);
    testEnv.close();
}

Example 3 with TopicMessageQuery

use of com.hedera.hashgraph.sdk.TopicMessageQuery in project hedera-sdk-java by hashgraph.

the class ConsensusPubSubChunkedExample method main.

public static void main(String[] args) throws TimeoutException, PrecheckStatusException, ReceiptStatusException, InterruptedException, InvalidProtocolBufferException {
    Client client = Client.forName(HEDERA_NETWORK);
    // Defaults the operator account ID and key such that all generated transactions will be paid for
    // by this account and be signed by this key
    client.setOperator(OPERATOR_ID, OPERATOR_KEY);
    // generate a submit key to use with the topic
    PrivateKey submitKey = PrivateKey.generateED25519();
    // make a new topic ID to use
    TopicId newTopicId = new TopicCreateTransaction().setTopicMemo("hedera-sdk-java/ConsensusPubSubChunkedExample").setSubmitKey(submitKey).execute(client).getReceipt(client).topicId;
    assert newTopicId != null;
    System.out.println("for topic " + newTopicId);
    // Let's wait a bit
    System.out.println("wait 10s to propagate to the mirror ...");
    Thread.sleep(10000);
    // setup a mirror client to print out messages as we receive them
    new TopicMessageQuery().setTopicId(newTopicId).subscribe(client, topicMessage -> {
        System.out.println("at " + topicMessage.consensusTimestamp + " ( seq = " + topicMessage.sequenceNumber + " ) received topic message of " + topicMessage.contents.length + " bytes");
    });
    // get a large file to send
    String bigContents = readResources("large_message.txt");
    System.out.println("about to prepare a transaction to send a message of " + bigContents.length() + " bytes");
    // prepare a message send transaction that requires a submit key from "somewhere else"
    @Var Transaction<?> transaction = new TopicMessageSubmitTransaction().setMaxChunks(// this is 10 by default
    15).setTopicId(newTopicId).setMessage(bigContents).signWithOperator(client);
    // serialize to bytes so we can be signed "somewhere else" by the submit key
    byte[] transactionBytes = transaction.toBytes();
    // now pretend we sent those bytes across the network
    // parse them into a transaction so we can sign as the submit key
    transaction = Transaction.fromBytes(transactionBytes);
    // view out the message size from the parsed transaction
    // this can be useful to display what we are about to sign
    long transactionMessageSize = ((TopicMessageSubmitTransaction) transaction).getMessage().size();
    System.out.println("about to send a transaction with a message of " + transactionMessageSize + " bytes");
    // sign with that submit key
    transaction.sign(submitKey);
    // now actually submit the transaction
    // get the receipt to ensure there were no errors
    transaction.execute(client).getReceipt(client);
    // noinspection InfiniteLoopStatement
    while (true) {
        System.out.println("waiting ...");
        // noinspection BusyWait
        Thread.sleep(2500);
    }
}

Example 4 with TopicMessageQuery

use of com.hedera.hashgraph.sdk.TopicMessageQuery in project hedera-sdk-java by hashgraph.

the class ConsensusPubSubExample method main.

public static void main(String[] args) throws TimeoutException, InterruptedException, PrecheckStatusException, ReceiptStatusException {
    Client client = Client.forName(HEDERA_NETWORK);
    // Defaults the operator account ID and key such that all generated transactions will be paid for
    // by this account and be signed by this key
    client.setOperator(OPERATOR_ID, OPERATOR_KEY);
    TransactionResponse transactionResponse = new TopicCreateTransaction().execute(client);
    TransactionReceipt transactionReceipt = transactionResponse.getReceipt(client);
    TopicId topicId = Objects.requireNonNull(transactionReceipt.topicId);
    System.out.println("New topic created: " + topicId);
    Thread.sleep(5000);
    new TopicMessageQuery().setTopicId(topicId).subscribe(client, resp -> {
        String messageAsString = new String(resp.contents, StandardCharsets.UTF_8);
        System.out.println(resp.consensusTimestamp + " received topic message: " + messageAsString);
    });
    // noinspection InfiniteLoopStatement
    for (int i = 0; ; i++) {
        new TopicMessageSubmitTransaction().setTopicId(topicId).setMessage("hello, HCS! " + i).execute(client).getReceipt(client);
        Thread.sleep(2500);
    }
}

Example 5 with TopicMessageQuery

use of com.hedera.hashgraph.sdk.TopicMessageQuery in project hedera-mirror-node by hashgraph.

the class TopicFeature method createNewOpenTopic.

@Given("I successfully create a new open topic")
public void createNewOpenTopic() {
    testInstantReference = Instant.now();
    NetworkTransactionResponse networkTransactionResponse = topicClient.createTopic(topicClient.getSdkClient().getExpandedOperatorAccountId(), null);
    assertNotNull(networkTransactionResponse.getReceipt());
    TopicId topicId = networkTransactionResponse.getReceipt().topicId;
    assertNotNull(topicId);
    consensusTopicId = topicId;
    topicMessageQuery = new TopicMessageQuery().setTopicId(consensusTopicId).setStartTime(Instant.EPOCH);
    log.debug("Set TopicMessageQuery with topic: {}, startTime: {}", consensusTopicId, Instant.EPOCH);
}