public bool setState(string state)
{
if (state == STATE_IDLE)
{
workerRoleInstance.State = STATE_IDLE;
}
else if (state == STATE_LOADING)
{
workerRoleInstance.State = STATE_LOADING;
}
else if (state == STATE_CRAWLING)
{
workerRoleInstance.State = STATE_CRAWLING;
}
else
{
return(false);
}
TableOperation updateOperation = TableOperation.Replace(workerRoleInstance);
workerRoleTable.Execute(updateOperation);
// refresh references to components
statsManager = new StatsManager();
webLoader = new WebLoader();
webCrawler = new WebCrawler(statsManager);
return(true);
}
public WorkerStateMachine(string workerID)
{
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(
ConfigurationManager.AppSettings["StorageConnectionString"]
);
CloudTableClient tableClient = storageAccount.CreateCloudTableClient();
workerRoleTable = tableClient.GetTableReference(WorkerRoleEntity.TABLE_WORKER_ROLES);
TableOperation retrieveOperation = TableOperation.Retrieve <WorkerRoleEntity>(WorkerRoleEntity.TABLE_WORKER_ROLES, workerID);
TableResult retrievedResult = workerRoleTable.Execute(retrieveOperation);
if (retrievedResult.Result == null)
{
workerRoleInstance = new WorkerRoleEntity(workerID, STATE_IDLE);
TableOperation insertOperation = TableOperation.Insert(workerRoleInstance);
workerRoleTable.Execute(insertOperation);
}
else
{
workerRoleInstance = (WorkerRoleEntity)retrievedResult.Result;
this.setState(workerRoleInstance.State);
}
statsManager = new StatsManager();
webLoader = new WebLoader();
webCrawler = new WebCrawler(statsManager);
}