About

This is the core functionality of framework for creating rich objects with complex structure and building execution threads in a functional style. See core classes in the package computing.core:

ExecutionFlow
Stage
Task

ExecutionEngine

AsyncResult
Event

Execution Engine supports the following features:

• Asynchronous execution and concurrency with CompletableFuture classes from Java 8

• Feather for dependency injection

• Auto-configuration of execution via annotations

• MyBatis ORM for persistence level

• Auto-commit and transactional mechanism for database operations

Launching classes with process launcher

1. Annotate your main class with @Entry annotation
2. The executable class must extend computing.core.Stage. Business logic must be defined by the way of overriding exec method

Statuses are stored in the database

Database connection is mandatory for core to work. It is used to store statuses of currently running business processes and more.

Certificate configuration on client side (Secret Vault usage)

1 Download certificate from website and save it to file RestCert1.cer (for example)

2 Make import of certificate using the command:

keytool -import -noprompt -trustcacerts -alias rest_db_cert_1 -file   RestCert1.cer  -keystore "c:\Program Files\Java\jre1.8.0_201\lib\security\cacerts" -storepass changeit

boot.properties file MUST present on classpath during run

Contents of this file are used during boot time.

The example file has the following structure:

# Configuration File
# ===================================================
#
# Refer to the "Client Configuration" section in the main
# documentation for a complete description of this file.  A short
# synopsis follows.
#
# This file defines:
# 
# 1) what database to connect to
# 2) secret vault info
# 3) packages to scan for myBatis mappers
# 4) custom configuration for Feather

## PostgreSQL settings
datasource.url=jdbc:postgresql://127.0.0.1:5432/database
datasource.username=postgres
datasource.password=admin

# Secret Vault
vaultservice.url=https://127.0.0.1:8443/svcs/rs/vault

# defines paths to be scanned during boot (@Entry classes)
packages=computing

# defines classes to be used for Feather providers
configuration=computing.model.DefaultConfiguration

# defines paths to be scanned for classes annotated with @Datastore
# for MyBatis persistence level
mapperscan=computing.sample.mappers,computing.demo.dao,computing.client.database.dao

## DO NOT EDIT 
## reserved for server configuration
## hibernate: show all queries

server.port=8443

spring.jpa.show-sql=true
spring.jpa.properties.hibernate.format_sql=true
logging.level.org.hibernate.type=trace
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
spring.jpa.properties.hibernate.current_session_context_class=org.hibernate.context.internal.ThreadLocalSessionContext

# enabling H2 Console
spring.h2.console.enabled=true

# turn Statistics on
spring.jpa.properties.hibernate.generate_statistics=true
logging.level.org.hibernate.stat=info
logging.level.root=WARN
logging.level.org.springframework.web=DEBUG
logging.level.org.hibernate=ERROR

## security
server.ssl.key-alias=selfsigned_localhost_sslserver
server.ssl.key-password=changeit
server.ssl.key-store=classpath:ssl-server.jks
server.ssl.key-store-provider=SUN
server.ssl.key-store-type=JKS