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Helios-2.40
River stage one • 5 direct dependents • 5 total dependents

Changes for version 2.40 - 2012-01-22

  • -NEW Extensible logging subsystem (Helios::Logger) -NEW Helios::Error::BaseError exception class; acts as parent for entire Helios::Error:: hierarchy -NEW Helios::Service->metarun() method to modularize metajob handling and provide for extensible metajob support -NEW service run() and metarun() methods now run in an eval block as a process safety measure to catch uncaught exceptions. -NEW MP3IndexerService example application including in eg/ directory (StubService also rewritten for clarity) -REVISED Helios::Service->work() method no longer pays attention to return value of run() method (this feature was under- documented, misunderstood, and caused problems with eval {} and Try::Tiny exception handling -REWRITTEN submitJob.pl CGI script; supports sending XML stream in addition to form encoding, no longer dependent on HELIOS_CLASS_MAP -REWRITTEN Helios::TestService; more modern Perl and easier to understand -REWRITTEN install instructions, including specific instructions for Red Hat- and Ubuntu-based systems, and including CPAN install
  • bundles (still experimental)
  • -REWRITTEN Helios::Tutorial -Helios::Service: fixed MaxRetries() and RetryInterval() retry job methods -Helios::Job: changed failed() and failedNoRetry() to limit the char length of the error recorded to 254 chars. That's one less than the default size of the db field in the ERROR table, so it should prevent long errors like stack traces from unexpectedly blowing up worker processes and potentially losing jobs. -Revised dependencies: DBI 1.52 (shipped with RHEL/CentOS 5) XML::Simple 2.14 (shipped with RHEL/CentOS 5) Removed XML::SAX dependency (unnecessary) Removed XML::Namespace dependency (unnecessary) Removed XML::Parser dependency (unnecessary) -Removed deprecated classes, methods, and other files: Helios::Service->parseArgXML() (deprecated since 2.00) Helios::Worker (deprecated since 2.00) sql/helios_schema_20upgrade.sql -Updated copyright notices -Switch to "Linux-style" versioning: odd minor version == development version even minor version == stable version second minor number == patch level (we're still also using Perl-style _ for devel versions too)

Documentation

submitJob.pl
CGI script to receive jobs for Helios via HTTP POST
helios.pl
Launch a daemon to service jobs in the Helios job processing system
helios_job_submit.pl
Submit a job to the Helios job processing system from the cmd line
helios_log_clean.pl
Clean old log and history entries from the Helios database
Helios::Tutorial
a tutorial for getting started with Helios

Modules

MP3IndexerService
Stub::StubService
Bundle::Helios::Generic
install all Helios related modules
Bundle::Helios::RedHat
install all Helios related modules on Red Hat-based systems
Helios
a distributed job processing system
Helios::Error
a convenience class to import all Helios::Error exception classes
Helios::Error::BaseError
base exception class for Helios services
Helios::Error::DatabaseError
exception class for Helios indicating a database error occurred
Helios::Error::Fatal
fatal exception class for Helios indicating a job failed but can be re-attempted
Helios::Error::FatalNoRetry
fatal exception class for Helios indicating a job failed and the error was so serious the job should not be reattempted.
Helios::Error::InvalidArg
exception class for Helios indicating a job's args are invalid
Helios::Error::LoggingError
exception class for Helios indicating an error occurred in the logging subsystem
Helios::Error::Warning
exception class for Helios indicating a job was successful but it encountered errors during processing
Helios::Job
base class for jobs in the Helios job processing system
Helios::Logger
Base class for sending Helios logging information to external loggers
Helios::Logger::Internal
Helios::Logger subclass reimplementing Helios internal logging
Helios::MetajobBurstService
base class for metajob burst services in Helios
Helios::Service
base class for services in the Helios job processing system
Helios::TestService
Helios::Service subclass useful for testing

Provides

Helios::ConfigParam
in lib/Helios/ConfigParam.pm
Helios::JobHistory
in lib/Helios/JobHistory.pm
Helios::LogEntry
in lib/Helios/LogEntry.pm
Helios::LogEntry::Levels
in lib/Helios/LogEntry/Levels.pm

Examples

Other files