processor

---

id: py-processor

processor

const processor: Processor

The current processor instance. Provides access to ports, arguments, logging, and processor-specific configuration.

---

At a Glance

def on_init():
    # Resolve output port once at init
    global OUTPUT_PORT
    OUTPUT_PORT = processor.getOutputPort('Output')

def on_message():
    # Log with processor context
    processor.logInfo(f'Processing message {message.id}')

    # Access custom arguments
    args = processor.getArguments()
    timeout = args.get('timeoutMs', 5000)

    # Expand environment variables in strings
    path = processor.expandString('${lay:DATA_DIR}/input.csv')

---

Common Tasks

Task	Method
Get output port	processor.getOutputPort(name)
Get input port	processor.getInputPort(name)
Read arguments	processor.getArguments()
Expand variables	processor.expandString(template)
Log info	processor.logInfo(msg)
Log warning	processor.logWarning(msg)
Log error	processor.logError(msg)

---

See Also

• Processor — Full class reference