public acquire()

in src/lock.ts [73:95]

• 21 lines of code
• 2 McCabe index (conditional complexity)

  public acquire(): Promise<this> {
    const lease = (this.lease = new Lease(this.pool, this.namespace, this.leaseTTL));
    const kv = new RPC.KVClient(this.pool);

    return lease.grant().then(leaseID => {
      return new ComparatorBuilder(kv, this.namespace)
        .and(this.key, 'Create', '==', 0)
        .then(new PutBuilder(kv, this.namespace, this.key).value('').lease(leaseID))
        .options(this.callOptions)
        .commit()
        .then<this>(res => {
          if (res.succeeded) {
            return this;
          }

          return this.release()
            .catch(() => undefined)
            .then(() => {
              throw new EtcdLockFailedError(`Failed to acquire a lock on ${this.key}`);
            });
        });
    });
  }