Examples with OpcUaClient org.eclipse.milo.opcua.sdk.client.OpcUaClient used on opensource projects

Example 1 with OpcUaClient

use of org.eclipse.milo.opcua.sdk.client.OpcUaClient in project milo by eclipse.

the class SubscriptionExample method run.

@Override
public void run(OpcUaClient client, CompletableFuture<OpcUaClient> future) throws Exception {
    // synchronous connect
    client.connect().get();
    // create a subscription @ 1000ms
    UaSubscription subscription = client.getSubscriptionManager().createSubscription(1000.0).get();
    // subscribe to the Value attribute of the server's CurrentTime node
    ReadValueId readValueId = new ReadValueId(Identifiers.Server_ServerStatus_CurrentTime, AttributeId.Value.uid(), null, QualifiedName.NULL_VALUE);
    // IMPORTANT: client handle must be unique per item within the context of a subscription.
    // You are not required to use the UaSubscription's client handle sequence; it is provided as a convenience.
    // Your application is free to assign client handles by whatever means necessary.
    UInteger clientHandle = subscription.nextClientHandle();
    MonitoringParameters parameters = new MonitoringParameters(clientHandle, // sampling interval
    1000.0, // filter, null means use default
    null, // queue size
    uint(10), // discard oldest
    true);
    MonitoredItemCreateRequest request = new MonitoredItemCreateRequest(readValueId, MonitoringMode.Reporting, parameters);
    // when creating items in MonitoringMode.Reporting this callback is where each item needs to have its
    // value/event consumer hooked up. The alternative is to create the item in sampling mode, hook up the
    // consumer after the creation call completes, and then change the mode for all items to reporting.
    UaSubscription.ItemCreationCallback onItemCreated = (item, id) -> item.setValueConsumer(this::onSubscriptionValue);
    List<UaMonitoredItem> items = subscription.createMonitoredItems(TimestampsToReturn.Both, newArrayList(request), onItemCreated).get();
    for (UaMonitoredItem item : items) {
        if (item.getStatusCode().isGood()) {
            logger.info("item created for nodeId={}", item.getReadValueId().getNodeId());
        } else {
            logger.warn("failed to create item for nodeId={} (status={})", item.getReadValueId().getNodeId(), item.getStatusCode());
        }
    }
    // let the example run for 5 seconds then terminate
    Thread.sleep(5000);
    future.complete(client);
}

Example 2 with OpcUaClient

use of org.eclipse.milo.opcua.sdk.client.OpcUaClient in project milo by eclipse.

the class SessionFsmFactory method initialize.

private static CompletableFuture<Unit> initialize(FsmContext<State, Event> ctx, OpcUaClient client, OpcUaSession session) {
    List<SessionFsm.SessionInitializer> initializers = KEY_SESSION_INITIALIZERS.get(ctx).sessionInitializers;
    if (initializers.isEmpty()) {
        return completedFuture(Unit.VALUE);
    } else {
        UaStackClient stackClient = client.getStackClient();
        CompletableFuture<?>[] futures = initializers.stream().map(i -> i.initialize(stackClient, session)).toArray(CompletableFuture[]::new);
        return CompletableFuture.allOf(futures).thenApply(v -> Unit.VALUE);
    }
}

Example 3 with OpcUaClient

use of org.eclipse.milo.opcua.sdk.client.OpcUaClient in project milo by eclipse.

the class SessionFsmFactory method createSession.

@SuppressWarnings("Duplicates")
private static CompletableFuture<CreateSessionResponse> createSession(FsmContext<State, Event> ctx, OpcUaClient client) {
    UaStackClient stackClient = client.getStackClient();
    EndpointDescription endpoint = stackClient.getConfig().getEndpoint();
    String gatewayServerUri = endpoint.getServer().getGatewayServerUri();
    String serverUri;
    if (gatewayServerUri != null && !gatewayServerUri.isEmpty()) {
        serverUri = endpoint.getServer().getApplicationUri();
    } else {
        serverUri = null;
    }
    ByteString clientNonce = NonceUtil.generateNonce(32);
    ByteString clientCertificate = stackClient.getConfig().getCertificate().map(c -> {
        try {
            return ByteString.of(c.getEncoded());
        } catch (CertificateEncodingException e) {
            return ByteString.NULL_VALUE;
        }
    }).orElse(ByteString.NULL_VALUE);
    ApplicationDescription clientDescription = new ApplicationDescription(client.getConfig().getApplicationUri(), client.getConfig().getProductUri(), client.getConfig().getApplicationName(), ApplicationType.Client, null, null, null);
    CreateSessionRequest request = new CreateSessionRequest(client.newRequestHeader(), clientDescription, serverUri, client.getConfig().getEndpoint().getEndpointUrl(), client.getConfig().getSessionName().get(), clientNonce, clientCertificate, client.getConfig().getSessionTimeout().doubleValue(), client.getConfig().getMaxResponseMessageSize());
    LOGGER.debug("[{}] Sending CreateSessionRequest...", ctx.getInstanceId());
    return stackClient.sendRequest(request).thenApply(CreateSessionResponse.class::cast).thenCompose(response -> {
        try {
            SecurityPolicy securityPolicy = SecurityPolicy.fromUri(endpoint.getSecurityPolicyUri());
            if (securityPolicy != SecurityPolicy.None) {
                if (response.getServerCertificate().isNullOrEmpty()) {
                    throw new UaException(StatusCodes.Bad_SecurityChecksFailed, "Certificate missing from CreateSessionResponse");
                }
                List<X509Certificate> serverCertificateChain = CertificateUtil.decodeCertificates(response.getServerCertificate().bytesOrEmpty());
                X509Certificate serverCertificate = serverCertificateChain.get(0);
                X509Certificate certificateFromEndpoint = CertificateUtil.decodeCertificate(endpoint.getServerCertificate().bytesOrEmpty());
                if (!serverCertificate.equals(certificateFromEndpoint)) {
                    throw new UaException(StatusCodes.Bad_SecurityChecksFailed, "Certificate from CreateSessionResponse did not " + "match certificate from EndpointDescription!");
                }
                client.getConfig().getCertificateValidator().validateCertificateChain(serverCertificateChain, endpoint.getServer().getApplicationUri(), EndpointUtil.getHost(endpoint.getEndpointUrl()));
                SignatureData serverSignature = response.getServerSignature();
                byte[] dataBytes = Bytes.concat(clientCertificate.bytesOrEmpty(), clientNonce.bytesOrEmpty());
                byte[] signatureBytes = serverSignature.getSignature().bytesOrEmpty();
                SignatureUtil.verify(SecurityAlgorithm.fromUri(serverSignature.getAlgorithm()), serverCertificate, dataBytes, signatureBytes);
            }
            return completedFuture(response);
        } catch (UaException e) {
            return failedFuture(e);
        }
    });
}

Example 4 with OpcUaClient

use of org.eclipse.milo.opcua.sdk.client.OpcUaClient in project tech-pdai-spring-demos by realpdai.

the class OpcUaClientServiceImpl method retrieveGenericDataList.

/**
 * retrieve multiple data.
 *
 * @param nodeIds nodeIds
 * @param maxAge  maxAge
 * @return data value
 * @throws java.security.UnrecoverableKeyException UnrecoverableKey Exception
 * @throws UaException                             Ua Exception
 * @throws java.security.cert.CertificateException Certificate Exception
 * @throws java.io.IOException                     IO Exception
 * @throws java.security.KeyStoreException         KeyStore Exception
 * @throws java.security.NoSuchAlgorithmException  NoSuchAlgorithm Exception
 * @throws java.util.concurrent.ExecutionException Execution Exception
 * @throws InterruptedException                    Interrupted Exception
 */
@Override
public List<DataValue> retrieveGenericDataList(List<NodeId> nodeIds, double maxAge) throws UnrecoverableKeyException, UaException, CertificateException, IOException, KeyStoreException, NoSuchAlgorithmException, ExecutionException, InterruptedException {
    OpcUaClient opcClient = getOpcUaClient();
    try {
        opcClient.addSessionInitializer(new DataTypeDictionarySessionInitializer(new GenericBsdParser()));
        opcClient.connect().get();
        return opcClient.readValues(maxAge, TimestampsToReturn.Both, nodeIds).get();
    } finally {
        opcClient.disconnect();
    }
}

Example 5 with OpcUaClient

use of org.eclipse.milo.opcua.sdk.client.OpcUaClient in project JBM by numen06.

the class OpcUaTemplate method subscribeItem.

/**
 * 订阅节点
 */
public <T extends ValueChanageEvent> void subscribeItem(String deviceId, OpcPoint opcPoint, T callBackEvent) {
    OpcUaClient client;
    try {
        log.info("OPCUA订阅点位:{}", opcPoint.getAlias());
        OpcUaClientBean opcUaClientBean = this.clientMap.get(deviceId);
        // client = getOpcUaClient(deviceId);
        client = opcUaClientBean.getOpcUaClient();
        client.connect().get();
        List<UaMonitoredItem> items = this.createItemMonitored(opcUaClientBean, opcPoint);
        // 循环设置回调事件
        this.putEvent(opcUaClientBean, opcPoint, callBackEvent);
    } catch (Exception e) {
        log.error("Opc Ua Point Write Error", e);
    }
}