Function Management

FunctionGraph provides console-based function management.

The Node.js, Java, Python, Go, and custom runtimes are supported. Table 1 provides the details.

You are advised to use the latest runtime version.

**Table 1** Runtimes
Runtime	Supported Version
Node.js	6.10, 8.10, 10.16, 12.13, 14.18, 16.17
Python	2.7, 3.6, 3.9
Java	8.0 and 11
Go	1.x
C#	.NET Core 2.1 and .NET Core 3.1
PHP	7.3
Custom	-

Multiple code entry modes

FunctionGraph allows you to edit code inline, upload a ZIP file from Object Storage Service (OBS), or directly upload a ZIP or JAR file. Table 2 lists the code entry modes supported for each runtime.

**Table 2** Code entry modes
Runtime	Editing Code Inline	Uploading a ZIP File	Uploading a JAR File	Uploading a ZIP File from OBS
Node.js	Supported	Supported	Not supported	Supported
Python	Supported	Supported	Not supported	Supported
Java	Not supported	Supported	Supported	Supported
Go	Not supported	Supported	Not supported	Supported
C#	Not supported	Supported	Not supported	Supported
PHP	Supported	Supported	Not supported	Supported
Custom	Supported	Supported	Not supported	Supported

Trigger

Table 3 lists the invocation modes for different trigger types.

**Table 3** Function invocation modes
Trigger	Function Invocation Mode
SMN trigger	Asynchronous invocation
APIG trigger	Synchronous invocation
OBS trigger	Asynchronous invocation
Data Ingestion Service (DIS) trigger	Asynchronous invocation
Timer trigger	Asynchronous invocation
Log Tank Service (LTS) trigger	Asynchronous invocation
Cloud Trace Service (CTS) trigger	Asynchronous invocation
Document Database Service (DDS) trigger	Asynchronous invocation
Kafka trigger	Asynchronous invocation

Logs and Metrics

FunctionGraph graphically displays function monitoring metrics and collects function running logs, enabling you to view function statuses, and locate problems by querying logs.

To query logs, see Managing Function Logs.

For details about monitoring metric, see Function Monitoring.

For details about tenant-level function monitoring metrics, see Introduction to Dashboard.

Function Initialization

The initializer interface is introduced to:

Isolate function initialization and request processing to enable clearer program logic and better structured and higher-performance code.
Ensure smooth function upgrade to prevent performance loss during the application layer's cold start initialization. Enable new function instances to automatically execute initialization logic before processing requests.
Identify the overhead of application layer initialization, and accurately determine the time for resource scaling and the quantity of required resources. This feature makes request latency more stable when the application load increases and more function instances are required.

HTTP Functions

You can set Function Type to HTTP Function on the function creation page. HTTP functions are designed to optimize web services. You can send HTTP requests to URLs to trigger function execution. HTTP functions support APIG and API Connect (APIC) triggers only.

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