aws-cdk
Version:
AWS CDK CLI, the command line tool for CDK apps
128 lines • 19.2 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.StackEventPoller = void 0;
const util_1 = require("../../util");
class StackEventPoller {
constructor(cfn, props) {
this.cfn = cfn;
this.props = props;
this.events = [];
this.complete = false;
this.eventIds = new Set();
this.nestedStackPollers = {};
}
/**
* From all accumulated events, return only the errors
*/
get resourceErrors() {
return this.events.filter((e) => e.event.ResourceStatus?.endsWith('_FAILED') && !e.isStackEvent);
}
/**
* Poll for new stack events
*
* Will not return events older than events indicated by the constructor filters.
*
* Recurses into nested stacks, and returns events old-to-new.
*/
async poll() {
const events = await this.doPoll();
// Also poll all nested stacks we're currently tracking
for (const [logicalId, poller] of Object.entries(this.nestedStackPollers)) {
events.push(...(await poller.poll()));
if (poller.complete) {
delete this.nestedStackPollers[logicalId];
}
}
// Return what we have so far
events.sort((a, b) => a.event.Timestamp.valueOf() - b.event.Timestamp.valueOf());
this.events.push(...events);
return events;
}
async doPoll() {
const events = [];
try {
let nextToken;
let finished = false;
while (!finished) {
const page = await this.cfn.describeStackEvents({ StackName: this.props.stackName, NextToken: nextToken });
for (const event of page?.StackEvents ?? []) {
// Event from before we were interested in 'em
if (this.props.startTime !== undefined && event.Timestamp.valueOf() < this.props.startTime) {
return events;
}
// Already seen this one
if (this.eventIds.has(event.EventId)) {
return events;
}
this.eventIds.add(event.EventId);
// The events for the stack itself are also included next to events about resources; we can test for them in this way.
const isParentStackEvent = event.PhysicalResourceId === event.StackId;
if (isParentStackEvent && this.props.stackStatuses?.includes(event.ResourceStatus ?? '')) {
return events;
}
// Fresh event
const resEvent = {
event: event,
parentStackLogicalIds: this.props.parentStackLogicalIds ?? [],
isStackEvent: isParentStackEvent,
};
events.push(resEvent);
if (!isParentStackEvent &&
event.ResourceType === 'AWS::CloudFormation::Stack' &&
isStackBeginOperationState(event.ResourceStatus)) {
// If the event is not for `this` stack and has a physical resource Id, recursively call for events in the nested stack
this.trackNestedStack(event, [...(this.props.parentStackLogicalIds ?? []), event.LogicalResourceId ?? '']);
}
if (isParentStackEvent && isStackTerminalState(event.ResourceStatus)) {
this.complete = true;
}
}
nextToken = page?.NextToken;
if (nextToken === undefined) {
finished = true;
}
}
}
catch (e) {
if (!(e.name === 'ValidationError' && (0, util_1.formatErrorMessage)(e) === `Stack [${this.props.stackName}] does not exist`)) {
throw e;
}
}
return events;
}
/**
* On the CREATE_IN_PROGRESS, UPDATE_IN_PROGRESS, DELETE_IN_PROGRESS event of a nested stack, poll the nested stack updates
*/
trackNestedStack(event, parentStackLogicalIds) {
const logicalId = event.LogicalResourceId;
const physicalResourceId = event.PhysicalResourceId;
// The CREATE_IN_PROGRESS event for a Nested Stack is emitted twice; first without a PhysicalResourceId
// and then with. Ignore this event if we don't have that property yet.
//
// (At this point, I also don't trust that logicalId is always going to be there so validate that as well)
if (!logicalId || !physicalResourceId) {
return;
}
if (!this.nestedStackPollers[logicalId]) {
this.nestedStackPollers[logicalId] = new StackEventPoller(this.cfn, {
stackName: physicalResourceId,
parentStackLogicalIds: parentStackLogicalIds,
startTime: event.Timestamp.valueOf(),
});
}
}
}
exports.StackEventPoller = StackEventPoller;
function isStackBeginOperationState(state) {
return [
'CREATE_IN_PROGRESS',
'UPDATE_IN_PROGRESS',
'DELETE_IN_PROGRESS',
'UPDATE_ROLLBACK_IN_PROGRESS',
'ROLLBACK_IN_PROGRESS',
].includes(state ?? '');
}
function isStackTerminalState(state) {
return !(state ?? '').endsWith('_IN_PROGRESS');
}
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Read all events\n   */\n  readonly startTime?: number;\n\n  /**\n   * Stop reading when we see the stack entering this status\n   *\n   * Should be something like `CREATE_IN_PROGRESS`, `UPDATE_IN_PROGRESS`,\n   * `DELETE_IN_PROGRESS, `ROLLBACK_IN_PROGRESS`.\n   *\n   * @default - Read all events\n   */\n  readonly stackStatuses?: string[];\n}\n\nexport interface ResourceEvent {\n  /**\n   * The Stack Event as received from CloudFormation\n   */\n  readonly event: StackEvent;\n\n  /**\n   * IDs of parent stacks of the resource, in case of resources in nested stacks\n   */\n  readonly parentStackLogicalIds: string[];\n\n  /**\n   * Whether this event regards the root stack\n   *\n   * @default false\n   */\n  readonly isStackEvent?: boolean;\n}\n\nexport class StackEventPoller {\n  public readonly events: ResourceEvent[] = [];\n  public complete: boolean = false;\n\n  private readonly eventIds = new Set<string>();\n  private readonly nestedStackPollers: Record<string, StackEventPoller> = {};\n\n  constructor(\n    private readonly cfn: ICloudFormationClient,\n    private readonly props: StackEventPollerProps,\n  ) {\n  }\n\n  /**\n   * From all accumulated events, return only the errors\n   */\n  public get resourceErrors(): ResourceEvent[] {\n    return this.events.filter((e) => e.event.ResourceStatus?.endsWith('_FAILED') && !e.isStackEvent);\n  }\n\n  /**\n   * Poll for new stack events\n   *\n   * Will not return events older than events indicated by the constructor filters.\n   *\n   * Recurses into nested stacks, and returns events old-to-new.\n   */\n  public async poll(): Promise<ResourceEvent[]> {\n    const events: ResourceEvent[] = await this.doPoll();\n\n    // Also poll all nested stacks we're currently tracking\n    for (const [logicalId, poller] of Object.entries(this.nestedStackPollers)) {\n      events.push(...(await poller.poll()));\n      if (poller.complete) {\n        delete this.nestedStackPollers[logicalId];\n      }\n    }\n\n    // Return what we have so far\n    events.sort((a, b) => a.event.Timestamp!.valueOf() - b.event.Timestamp!.valueOf());\n    this.events.push(...events);\n    return events;\n  }\n\n  private async doPoll(): Promise<ResourceEvent[]> {\n    const events: ResourceEvent[] = [];\n    try {\n      let nextToken: string | undefined;\n      let finished = false;\n\n      while (!finished) {\n        const page = await this.cfn.describeStackEvents({ StackName: this.props.stackName, NextToken: nextToken });\n        for (const event of page?.StackEvents ?? []) {\n          // Event from before we were interested in 'em\n          if (this.props.startTime !== undefined && event.Timestamp!.valueOf() < this.props.startTime) {\n            return events;\n          }\n\n          // Already seen this one\n          if (this.eventIds.has(event.EventId!)) {\n            return events;\n          }\n          this.eventIds.add(event.EventId!);\n\n          // The events for the stack itself are also included next to events about resources; we can test for them in this way.\n          const isParentStackEvent = event.PhysicalResourceId === event.StackId;\n\n          if (isParentStackEvent && this.props.stackStatuses?.includes(event.ResourceStatus ?? '')) {\n            return events;\n          }\n\n          // Fresh event\n          const resEvent: ResourceEvent = {\n            event: event,\n            parentStackLogicalIds: this.props.parentStackLogicalIds ?? [],\n            isStackEvent: isParentStackEvent,\n          };\n          events.push(resEvent);\n\n          if (\n            !isParentStackEvent &&\n              event.ResourceType === 'AWS::CloudFormation::Stack' &&\n              isStackBeginOperationState(event.ResourceStatus)\n          ) {\n            // If the event is not for `this` stack and has a physical resource Id, recursively call for events in the nested stack\n            this.trackNestedStack(event, [...(this.props.parentStackLogicalIds ?? []), event.LogicalResourceId ?? '']);\n          }\n\n          if (isParentStackEvent && isStackTerminalState(event.ResourceStatus)) {\n            this.complete = true;\n          }\n        }\n\n        nextToken = page?.NextToken;\n        if (nextToken === undefined) {\n          finished = true;\n        }\n      }\n    } catch (e: any) {\n      if (!(e.name === 'ValidationError' && formatErrorMessage(e) === `Stack [${this.props.stackName}] does not exist`)) {\n        throw e;\n      }\n    }\n\n    return events;\n  }\n\n  /**\n   * On the CREATE_IN_PROGRESS, UPDATE_IN_PROGRESS, DELETE_IN_PROGRESS event of a nested stack, poll the nested stack updates\n   */\n  private trackNestedStack(event: StackEvent, parentStackLogicalIds: string[]) {\n    const logicalId = event.LogicalResourceId;\n    const physicalResourceId = event.PhysicalResourceId;\n\n    // The CREATE_IN_PROGRESS event for a Nested Stack is emitted twice; first without a PhysicalResourceId\n    // and then with. Ignore this event if we don't have that property yet.\n    //\n    // (At this point, I also don't trust that logicalId is always going to be there so validate that as well)\n    if (!logicalId || !physicalResourceId) {\n      return;\n    }\n\n    if (!this.nestedStackPollers[logicalId]) {\n      this.nestedStackPollers[logicalId] = new StackEventPoller(this.cfn, {\n        stackName: physicalResourceId,\n        parentStackLogicalIds: parentStackLogicalIds,\n        startTime: event.Timestamp!.valueOf(),\n      });\n    }\n  }\n}\n\nfunction isStackBeginOperationState(state: string | undefined) {\n  return [\n    'CREATE_IN_PROGRESS',\n    'UPDATE_IN_PROGRESS',\n    'DELETE_IN_PROGRESS',\n    'UPDATE_ROLLBACK_IN_PROGRESS',\n    'ROLLBACK_IN_PROGRESS',\n  ].includes(state ?? '');\n}\n\nfunction isStackTerminalState(state: string | undefined) {\n  return !(state ?? '').endsWith('_IN_PROGRESS');\n}\n"]}