Examples with Utf8String org.web3j.abi.datatypes.Utf8String used on opensource projects

Example 1 with Utf8String

use of org.web3j.abi.datatypes.Utf8String in project winery by eclipse.

the class ProvenanceSmartContractWrapper method getProvenance.

public CompletableFuture<List<ModelProvenanceElement>> getProvenance(final String identifier) {
    // eventName, indexed parameters, unindexed parameters
    final Event event = new Event("ResourceVersion", Arrays.asList(new TypeReference<Utf8String>() {
    }, new TypeReference<Address>() {
    }, new TypeReference<Bytes>() {
    }));
    EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST, DefaultBlockParameterName.LATEST, contract.getContractAddress()).addSingleTopic(EventEncoder.encode(event)).addOptionalTopics(Hash.sha3String(identifier)).addNullTopic();
    final CompletableFuture<List<ModelProvenanceElement>> result = new CompletableFuture<>();
    try {
        final int recordsCount = web3j.ethGetLogs(filter).send().getLogs().size();
        LOGGER.info(recordsCount + " provenance elements detected.");
        if (recordsCount > 0) {
            final List<ModelProvenanceElement> provenanceElements = new ArrayList<>();
            final Disposable subscription = ((Provenance) contract).resourceVersionEventFlowable(filter).subscribe(resourceVersionEventResponse -> {
                try {
                    final ModelProvenanceElement currentElement = generateProvenanceElement(resourceVersionEventResponse);
                    provenanceElements.add(currentElement);
                    if (provenanceElements.size() == recordsCount) {
                        result.complete(provenanceElements);
                    }
                } catch (EthereumException e) {
                    result.completeExceptionally(e);
                }
            });
            // unsubscribe the observable when the CompletableFuture completes (this frees threads)
            result.whenComplete((r, e) -> subscription.dispose());
        } else {
            // empty result
            result.complete(new ArrayList<>());
        }
    } catch (IOException e) {
        final String msg = "Failed detecting the number of provenance elements for the collaboration resource. Reason: " + e.getMessage();
        LOGGER.error(msg);
        result.completeExceptionally(new EthereumException(msg, e));
    }
    return result;
}

Example 2 with Utf8String

use of org.web3j.abi.datatypes.Utf8String in project winery by eclipse.

the class AuthorizationSmartContractWrapper method getAuthorizationTree.

/**
 * Retrieves the {@link AuthorizationInfo} from the blockchain.
 * If no authorization data can be retrieved, the completable future returns <code>null</code>.
 *
 * @param identifier The process identifier identifying the collaboration process.
 * @return A completable future containing the authorization information.
 */
public CompletableFuture<AuthorizationInfo> getAuthorizationTree(final String identifier) {
    // eventName, indexed parameters, unindexed parameters
    final Event event = new Event("Authorized", Arrays.asList(new TypeReference<Utf8String>() {
    }, new TypeReference<Address>() {
    }, new TypeReference<Address>() {
    }, new TypeReference<Utf8String>() {
    }));
    EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST, DefaultBlockParameterName.LATEST, contract.getContractAddress()).addSingleTopic(EventEncoder.encode(event)).addOptionalTopics(Hash.sha3String(identifier)).addNullTopic().addNullTopic();
    final CompletableFuture<AuthorizationInfo> result = new CompletableFuture<>();
    try {
        final int recordsCount = web3j.ethGetLogs(filter).send().getLogs().size();
        LOGGER.info(recordsCount + " authorization elements detected.");
        if (recordsCount > 0) {
            final List<AuthorizationElement> authorizationElements = new ArrayList<>();
            final Disposable subscription = ((Authorization) contract).authorizedEventFlowable(filter).subscribe(authorizedEventResponse -> {
                try {
                    final AuthorizationElement currentElement = generateAuthorizationElement(authorizedEventResponse);
                    authorizationElements.add(currentElement);
                    if (authorizationElements.size() == recordsCount) {
                        final AuthorizationTree tree = new AuthorizationTree(authorizationElements);
                        result.complete(tree);
                    }
                } catch (EthereumException e) {
                    result.completeExceptionally(e);
                }
            });
            // unsubscribe the observable when the CompletableFuture completes (this frees threads)
            result.whenComplete((r, e) -> subscription.dispose());
        } else {
            // empty result
            result.complete(null);
        }
    } catch (IOException e) {
        final String msg = "Failed detecting the number of authorization elements for the collaboration resource. Reason: " + e.getMessage();
        LOGGER.error(msg);
        result.completeExceptionally(new EthereumException(msg, e));
    }
    return result;
}