org.mule.runtime.config.internal.LazyValueProviderService Maven / Gradle / Ivy
/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.config.internal;
import static java.lang.String.format;
import static java.util.Optional.empty;
import static java.util.Optional.of;
import static java.util.Optional.ofNullable;
import static org.mule.runtime.api.exception.ExceptionHelper.getRootException;
import static org.mule.runtime.api.value.ResolvingFailure.Builder.newFailure;
import static org.mule.runtime.api.value.ValueResult.resultFrom;
import static org.mule.runtime.core.internal.value.MuleValueProviderServiceUtility.deleteLastPartFromLocation;
import static org.mule.runtime.core.internal.value.MuleValueProviderServiceUtility.isConnection;
import static org.mule.runtime.extension.api.values.ValueResolvingException.INVALID_LOCATION;
import static org.mule.runtime.extension.api.values.ValueResolvingException.UNKNOWN;
import org.mule.runtime.api.component.location.ConfigurationComponentLocator;
import org.mule.runtime.api.component.location.Location;
import org.mule.runtime.api.lifecycle.Initialisable;
import org.mule.runtime.api.lifecycle.InitialisationException;
import org.mule.runtime.api.meta.model.parameter.ValueProviderModel;
import org.mule.runtime.api.util.Reference;
import org.mule.runtime.api.value.ValueProviderService;
import org.mule.runtime.api.value.ValueResult;
import org.mule.runtime.config.internal.dsl.model.NoSuchComponentModelException;
import org.mule.runtime.extension.api.values.ComponentValueProvider;
import org.mule.runtime.extension.api.values.ConfigurationParameterValueProvider;
import javax.inject.Inject;
import javax.inject.Named;
import java.util.Optional;
import java.util.function.Supplier;
/**
* {@link ValueProviderService} implementation flavour that initialises just the required components before executing the
* resolving logic.
*
* This guarantees that if the application has been created lazily, the requested components exists before the execution of the
* actual {@link ValueProviderService}.
*
* @since 4.0
* @see ValueProviderService
*/
public class LazyValueProviderService implements ValueProviderService, Initialisable {
public static final String NON_LAZY_VALUE_PROVIDER_SERVICE = "_muleNonLazyValueProviderService";
private final Supplier valueProviderServiceSupplier;
private Supplier componentLocatorSupplier;
private LazyComponentInitializerAdapter lazyComponentInitializer;
@Inject
@Named(NON_LAZY_VALUE_PROVIDER_SERVICE)
private ValueProviderService providerService;
private ConfigurationComponentLocator componentLocator;
LazyValueProviderService(LazyComponentInitializerAdapter lazyComponentInitializer,
Supplier valueProviderServiceSupplier,
Supplier componentLocatorSupplier) {
this.lazyComponentInitializer = lazyComponentInitializer;
this.valueProviderServiceSupplier = valueProviderServiceSupplier;
this.componentLocatorSupplier = componentLocatorSupplier;
}
/**
* {@inheritDoc}
*/
@Override
public ValueResult getValues(Location location, String providerName) {
return initializeComponent(location)
.orElseGet(() -> providerService.getValues(location, providerName));
}
private Optional initializeComponent(Location location) {
Location locationWithOutConnection = locationWithOutConnection(location);
try {
lazyComponentInitializer.initializeComponent(locationWithOutConnection, false);
} catch (Exception e) {
Throwable rootException = getRootException(e);
if (rootException instanceof NoSuchComponentModelException) {
return of(resultFrom(newFailure(e)
.withFailureCode(INVALID_LOCATION)
.withMessage(format("Unable to resolve values. No component was found in the given location [%s]", location))
.build()));
}
return of(resultFrom(newFailure(e)
.withMessage("Unknown error occurred trying to resolve values. " + e.getMessage())
.withFailureCode(UNKNOWN)
.build()));
}
return empty();
}
private Location locationWithOutConnection(Location location) {
return isConnection(location) ? deleteLastPartFromLocation(location) : location;
}
@Override
public void initialise() throws InitialisationException {
this.providerService = valueProviderServiceSupplier.get();
this.componentLocator = componentLocatorSupplier.get();
}
public Optional getModel(Location location, String providerName) {
boolean isConnection = isConnection(location);
if (isConnection) {
location = deleteLastPartFromLocation(location);
}
return getModel(location, isConnection, providerName);
}
private Optional getModel(Location location, boolean isConnection, String providerName) {
Reference model = new Reference<>();
componentLocator.find(location).ifPresent(provider -> {
try {
if (provider instanceof ComponentValueProvider) {
model.set(((ComponentValueProvider) provider).getModels(providerName).get(0));
} else if (provider instanceof ConfigurationParameterValueProvider) {
if (isConnection) {
model.set(((ConfigurationParameterValueProvider) provider).getConnectionModels(providerName).get(0));
} else {
model.set(((ConfigurationParameterValueProvider) provider).getConfigModels(providerName).get(0));
}
}
} catch (Exception ignored) {
}
});
return ofNullable(model.get());
}
}