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/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.context;
import io.micronaut.context.annotation.ConfigurationReader;
import io.micronaut.context.env.PropertySource;
import io.micronaut.core.util.ArgumentUtils;
import io.micronaut.core.annotation.NonNull;
import io.micronaut.core.annotation.Nullable;
import io.micronaut.inject.BeanConfiguration;
import jakarta.inject.Singleton;
import java.lang.annotation.Annotation;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
/**
* An interface for building an application context.
*
* @author graemerocher
* @since 1.0
* @see ApplicationContextConfigurer
* @see ApplicationContext#builder()
*/
public interface ApplicationContextBuilder {
/**
* Sets the trace mode for bean resolution.
* @param traceMode The debug mode
* @param classPatterns The patterns
* @since 4.8.0
* @see BeanResolutionTraceMode
* @return This builder
*/
default @NonNull ApplicationContextBuilder beanResolutionTrace(
@NonNull BeanResolutionTraceMode traceMode,
String... classPatterns) {
Objects.requireNonNull(traceMode, "Trace mode cannot be null");
return beanResolutionTrace(
new BeanResolutionTraceConfiguration(
traceMode,
Set.of(classPatterns),
null
)
);
}
/**
* Sets the trace mode for bean resolution.
* @param configuration The trace configuration
* @since 4.8.0
* @see BeanResolutionTraceMode
* @return This builder
*/
default @NonNull ApplicationContextBuilder beanResolutionTrace(
@NonNull BeanResolutionTraceConfiguration configuration) {
return this;
}
/**
* Whether to eager initialize {@link io.micronaut.context.annotation.ConfigurationProperties} beans.
* @param eagerInitConfiguration True if configuration properties should be eagerly initialized
* @return The context builder
* @since 2.0
*/
default @NonNull ApplicationContextBuilder eagerInitConfiguration(boolean eagerInitConfiguration) {
if (eagerInitConfiguration) {
return eagerInitAnnotated(ConfigurationReader.class);
}
return this;
}
/**
* Whether to eager initialize singleton beans.
* @param eagerInitSingletons True if singletons should be eagerly initialized
* @return The context builder
* @since 2.0
*/
@SuppressWarnings("unchecked")
default @NonNull ApplicationContextBuilder eagerInitSingletons(boolean eagerInitSingletons) {
if (eagerInitSingletons) {
return eagerInitAnnotated(Singleton.class);
}
return this;
}
/**
* Specify whether the default set of property sources should be enabled (default is {@code true}).
* @param areEnabled Whether the default property sources are enabled
* @return This builder
* @since 3.7.0
*/
default @NonNull ApplicationContextBuilder enableDefaultPropertySources(boolean areEnabled) {
return this;
}
/**
* Specifies to eager init the given annotated types.
*
* @param annotations The annotation stereotypes
* @return The context builder
* @since 2.0
*/
@SuppressWarnings("unchecked")
@NonNull ApplicationContextBuilder eagerInitAnnotated(Class... annotations);
/**
* Override default config locations.
*
* @param configLocations The config locations
* @return This environment
* @since 2.0
*/
@NonNull ApplicationContextBuilder overrideConfigLocations(String... configLocations);
/**
* Additional singletons to register prior to startup.
*
* @param beans The beans
* @return This builder
*/
@NonNull ApplicationContextBuilder singletons(@Nullable Object... beans);
/**
* Register additional runtime bean definitions prior to startup.
* @param definitions The definitions.
* @return The context builder
* @since 4.5.0
*/
default @NonNull ApplicationContextBuilder beanDefinitions(@NonNull RuntimeBeanDefinition... definitions) {
return this;
}
/**
* Register additional bean configurations.
* @param configurations The configurations.
* @return This builder
* @since 4.8.0
*/
default @NonNull ApplicationContextBuilder beanConfigurations(@NonNull BeanConfiguration... configurations) {
return this;
}
/**
* If set to {@code true} (the default is {@code true}) Micronaut will attempt to automatically deduce the environment
* it is running in using environment variables and/or stack trace inspection.
*
* This method differs from {@link #deduceCloudEnvironment(boolean)} which performs extended network and/or disk probes
* to try and automatically establish the Cloud environment.
*
* This behaviour controls the automatic activation of, for example, the {@link io.micronaut.context.env.Environment#TEST} when running tests.
*
* @param deduceEnvironment The boolean
* @return This builder
*/
@NonNull ApplicationContextBuilder deduceEnvironment(@Nullable Boolean deduceEnvironment);
/**
* If set to {@code true} (the default value is {@code false}) Micronaut will attempt to automatically deduce the Cloud environment it is running within.
*
* Enabling this should be done with caution since network probes are required to figure out whether the application is
* running in certain clouds like GCP.
*
* @param deduceEnvironment The boolean
* @return This builder
* @since 4.0.0
*/
@NonNull ApplicationContextBuilder deduceCloudEnvironment(boolean deduceEnvironment);
/**
* The environments to use.
*
* @param environments The environments
* @return This builder
*/
@NonNull ApplicationContextBuilder environments(@Nullable String... environments);
/**
* The environments to use if no other environments are specified.
*
* @param environments The environments
* @return This builder
*/
@NonNull ApplicationContextBuilder defaultEnvironments(@Nullable String... environments);
/**
* The packages to include for package scanning.
*
* @param packages The packages
* @return This builder
*/
@NonNull ApplicationContextBuilder packages(@Nullable String... packages);
/**
* Properties to override from the environment.
*
* @param properties The properties
* @return This builder
*/
@NonNull ApplicationContextBuilder properties(@Nullable Map properties);
/**
* Additional property sources.
*
* @param propertySources The property sources to include
* @return This builder
*/
@NonNull ApplicationContextBuilder propertySources(@Nullable PropertySource... propertySources);
/**
* Set whether environment variables should contribute to configuration.
*
* @param environmentPropertySource The boolean
* @return This builder
*/
@NonNull ApplicationContextBuilder environmentPropertySource(boolean environmentPropertySource);
/**
* Which environment variables should contribute to configuration.
*
* @param environmentVariables The environment variables
* @return This builder
*/
@NonNull ApplicationContextBuilder environmentVariableIncludes(@Nullable String... environmentVariables);
/**
* Which environment variables should not contribute to configuration.
*
* @param environmentVariables The environment variables
* @return This builder
*/
@NonNull ApplicationContextBuilder environmentVariableExcludes(@Nullable String... environmentVariables);
/**
* The main class used by this application.
*
* @param mainClass The main class
* @return This builder
*/
@NonNull ApplicationContextBuilder mainClass(@Nullable Class mainClass);
/**
* The class loader to be used.
*
* @param classLoader The classloader
* @return This builder
*/
@NonNull ApplicationContextBuilder classLoader(@Nullable ClassLoader classLoader);
/**
* Builds the {@link ApplicationContext}, but does not start it.
*
* @return The built, but not running {@link ApplicationContext}
*/
@NonNull ApplicationContext build();
/**
* Allow customizing the configurations that will be loaded.
*
* @param configurations The configurations to include
* @return This application
*/
@NonNull ApplicationContextBuilder include(@Nullable String... configurations);
/**
* Allow customizing the configurations that will be loaded.
*
* @param configurations The configurations to exclude
* @return This application
*/
@NonNull ApplicationContextBuilder exclude(@Nullable String... configurations);
/**
* Whether the banner is enabled or not.
*
* @param isEnabled Whether the banner is enabled or not
* @return This application
*/
@NonNull ApplicationContextBuilder banner(boolean isEnabled);
/**
* Whether to error on an empty bean provider. Defaults to {@code false}.
*
* @param shouldAllow True if empty {@link jakarta.inject.Provider} instances are allowed
* @return This application
* @since 3.0.0
*/
@NonNull ApplicationContextBuilder allowEmptyProviders(boolean shouldAllow);
/**
* Set the command line arguments.
*
* @param args The arguments
* @return This application
*/
default @NonNull ApplicationContextBuilder args(@Nullable String... args) {
return this;
}
/**
* Sets whether the bootstrap environment should be initialized.
*
* @param bootstrapEnv True if it should be initialized. Default true
* @return This application
* @since 3.1.0
*/
default @NonNull ApplicationContextBuilder bootstrapEnvironment(boolean bootstrapEnv) {
return this;
}
/**
* Starts the {@link ApplicationContext}.
*
* @return The running {@link ApplicationContext}
*/
default @NonNull ApplicationContext start() {
return build().start();
}
/**
* Run the {@link ApplicationContext} with the given type. Returning an instance of the type.
*
* @param type The type of the bean to run
* @param The type, a subclass of {@link AutoCloseable}. The close method of the implementation should shut down the context.
* @return The running bean
*/
default @NonNull T run(@NonNull Class type) {
ArgumentUtils.requireNonNull("type", type);
ApplicationContext applicationContext = start();
T bean = applicationContext.getBean(type);
if (bean instanceof LifeCycle lifeCycle) {
if (!lifeCycle.isRunning()) {
lifeCycle.start();
}
}
return bean;
}
}
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