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process-event-listener.js
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process-event-listener.js
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module.exports = function (RED) {
function ProcessEventListener(config) {
RED.nodes.createNode(this, config);
var node = this;
node.engine = RED.nodes.getNode(config.engine);
let subscription;
const register = async () => {
const client = node.engine.engineClient;
if (!client) {
node.error('No engine configured.');
return;
}
const query = RED.util.evaluateNodeProperty(config.query, config.query_type, node);
async function subscribe(eventType) {
switch (eventType) {
case 'starting':
return await client.notification.onProcessStarting(async (processNotification) => {
if (
config.processmodel != '' &&
config.processmodel != processNotification.processModelId
) {
return;
}
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
processInstance: processInstance,
action: 'starting',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'started':
return await client.notification.onProcessStarted(async (processNotification) => {
if (
config.processmodel != '' &&
config.processmodel != processNotification.processModelId
) {
return;
}
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
flowNodeId: processNotification.flowNodeId,
token: processNotification.currentToken,
processInstance: processInstance,
action: 'started',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'resumed':
return await client.notification.onProcessResumed(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
token: processNotification.currentToken,
processInstance: processInstance,
action: 'resumed',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'finished':
return await client.notification.onProcessEnded(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
flowNodeId: processNotification.flowNodeId,
token: processNotification.currentToken,
processInstance: processInstance,
action: 'finished',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'terminated':
return await client.notification.onProcessTerminated(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
token: processNotification.currentToken,
processInstance: processInstance,
action: 'terminated',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'error':
return await client.notification.onProcessError(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
token: processNotification.currentToken,
processInstance: processInstance,
action: 'error',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'owner-changed':
return await client.notification.onProcessOwnerChanged(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
processInstance: processInstance,
action: 'owner-changed',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'instances-deleted':
return await client.notification.onProcessInstancesDeleted(async (processNotification) => {
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
const newQuery = {
processInstanceId: processNotification.processInstanceId,
...query,
};
try {
const matchingInstances = await client.processInstances.query(newQuery);
if (
matchingInstances.processInstances &&
matchingInstances.processInstances.length == 1
) {
const processInstance = matchingInstances.processInstances[0];
node.send({
payload: {
processInstanceId: processNotification.processInstanceId,
processModelId: processNotification.processModelId,
processInstance: processInstance,
action: 'instances-deleted',
type: 'processInstance',
},
});
}
} catch (error) {
node.error(JSON.stringify(error));
}
});
case 'is-executable-changed':
return await client.notification.onProcessIsExecutableChanged((processNotification) => {
node.log(
'processNotification (is-executable-changed): ' + JSON.stringify(processNotification)
);
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
node.send({
payload: {
processModelId: processNotification.processModelId,
action: 'is-executable-changed',
type: 'processModel',
},
});
});
case 'deployed':
return await client.notification.onProcessDeployed((processNotification) => {
node.log('processNotification (deployed): ' + JSON.stringify(processNotification));
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
node.send({
payload: {
processModelId: processNotification.processModelId,
action: 'deployed',
type: 'processModel',
},
});
});
case 'undeployed':
return await client.notification.onProcessUndeployed((processNotification) => {
node.log('processNotification (undeployed): ' + JSON.stringify(processNotification));
if (config.processmodel != '' && config.processmodel != processNotification.processModelId)
return;
node.send({
payload: {
processModelId: processNotification.processModelId,
action: 'undeployed',
type: 'processModel',
},
});
});
default:
console.error('no such event: ' + eventType);
break;
}
}
subscription = await subscribe(config.eventtype);
node.on('close', () => {
if (node.engine && node.engine.engineClient && client) {
client.notification.removeSubscription(subscription);
}
});
};
if (node.engine) {
register();
}
}
RED.nodes.registerType('process-event-listener', ProcessEventListener);
};