use of org.web3j.abi.datatypes.Event in project jbpm-work-items by kiegroup.
the class EthereumUtils method observeContractEvent.
public static void observeContractEvent(Web3j web3j, String contractEventName, String contractAddress, List<TypeReference<?>> indexedParameters, List<TypeReference<?>> nonIndexedParameters, String eventReturnType, KieSession kieSession, String signalName, boolean doAbortOnUpdate, WorkItemManager workItemManager, WorkItem workItem) {
Event event = new Event(contractEventName, indexedParameters, nonIndexedParameters);
EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST, DefaultBlockParameterName.LATEST, contractAddress);
filter.addSingleTopic(EventEncoder.encode(event));
Class<Type> type = (Class<Type>) AbiTypes.getType(eventReturnType);
TypeReference<Type> typeRef = TypeReference.create(type);
web3j.ethLogObservable(filter).subscribe(eventTrigger -> {
kieSession.signalEvent(signalName, FunctionReturnDecoder.decode(eventTrigger.getData(), Arrays.asList(typeRef)).get(0).getValue());
if (doAbortOnUpdate) {
workItemManager.completeWorkItem(workItem.getId(), null);
}
});
}
use of org.web3j.abi.datatypes.Event 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;
}
use of org.web3j.abi.datatypes.Event 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;
}
use of org.web3j.abi.datatypes.Event in project jbpm-work-items by kiegroup.
the class EthereumUtils method observeContractEvent.
public static void observeContractEvent(Web3j web3j, String contractEventName, String contractAddress, List<TypeReference<?>> indexedParameters, List<TypeReference<?>> nonIndexedParameters, String eventReturnType, KieSession kieSession, String signalName, boolean doAbortOnUpdate, WorkItemManager workItemManager, WorkItem workItem, rx.functions.Action1 action1) {
Event event = new Event(contractEventName, indexedParameters, nonIndexedParameters);
EthFilter filter = new EthFilter(DefaultBlockParameterName.EARLIEST, DefaultBlockParameterName.LATEST, contractAddress);
filter.addSingleTopic(EventEncoder.encode(event));
Class<Type> type = (Class<Type>) AbiTypes.getType(eventReturnType);
TypeReference<Type> typeRef = TypeReference.create(type);
web3j.ethLogObservable(filter).subscribe(action1);
}
Aggregations