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[SilverThings#47] [SilverThings#34] Implement version lookup and fix …
…cluster lookup - Versioning uses semver4j from https://github.com/vdurmont/semver4j in npm mode. It allows wider range of queries to be executed and rules for the version format is not so strict. i.e - major and patch versions are not required. see - https://github.com/npm/node-semver for more information. Process of resolving versions is described in VersionResolver. - Fix for cluster when main node of the cluster fails. - Cluster lookup now provides more clear information about a result of a lookup.
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...e-provider/src/main/java/io/silverware/microservices/annotations/MicroserviceVersion.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| /* | ||
| * -----------------------------------------------------------------------\ | ||
| * SilverWare | ||
| * | ||
| * Copyright (C) 2010 - 2016 the original author or 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 | ||
| * | ||
| * http://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.silverware.microservices.annotations; | ||
|
|
||
| import java.lang.annotation.Documented; | ||
| import java.lang.annotation.ElementType; | ||
| import java.lang.annotation.Inherited; | ||
| import java.lang.annotation.Retention; | ||
| import java.lang.annotation.RetentionPolicy; | ||
| import java.lang.annotation.Target; | ||
|
|
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| /** | ||
| * This annotation can be used in two different scenarios: | ||
| * <ul> | ||
| * <li><strong>Microservice:</strong> can specify version of Microservice Implementation and API. </li> | ||
| * <li><strong>Injection point:</strong> can specify supported version of a Microservice API. </li> | ||
| * </ul> | ||
| * These versions are used in the lookup of the Microservices in the cluster. | ||
| * See @{@link io.silverware.microservices.providers.cdi.util.VersionResolver} | ||
| * See @{@link io.silverware.microservices.util.VersionComparator} | ||
| * | ||
| * @author Slavomír Krupa ([email protected]) | ||
| */ | ||
| @Retention(RetentionPolicy.RUNTIME) | ||
| @Documented | ||
| @Inherited | ||
| @Target({ ElementType.TYPE }) | ||
| public @interface MicroserviceVersion { | ||
|
|
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| /** | ||
| * Gets the API version of the Microservice. | ||
| */ | ||
| String api() default ""; | ||
|
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| /** | ||
| * Gets the implementation version of the Microservice. | ||
| * If not defined then {@link io.silverware.microservices.providers.cdi.util.VersionResolver} continues in search for microservice version. | ||
| */ | ||
| String implementation() default ""; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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|
@@ -23,6 +23,7 @@ | |
| import io.silverware.microservices.MicroserviceMetaData; | ||
| import io.silverware.microservices.annotations.Microservice; | ||
| import io.silverware.microservices.annotations.MicroserviceReference; | ||
| import io.silverware.microservices.annotations.MicroserviceVersion; | ||
| import io.silverware.microservices.providers.MicroserviceProvider; | ||
| import io.silverware.microservices.providers.cdi.builtin.Configuration; | ||
| import io.silverware.microservices.providers.cdi.builtin.CurrentContext; | ||
|
|
@@ -32,6 +33,7 @@ | |
| import io.silverware.microservices.providers.cdi.internal.MicroservicesInitEvent; | ||
| import io.silverware.microservices.silver.CdiSilverService; | ||
| import io.silverware.microservices.util.Utils; | ||
| import io.silverware.microservices.util.VersionComparator; | ||
|
|
||
| import org.apache.logging.log4j.LogManager; | ||
| import org.apache.logging.log4j.Logger; | ||
|
|
@@ -44,7 +46,6 @@ | |
| import java.util.HashSet; | ||
| import java.util.Map; | ||
| import java.util.Set; | ||
|
|
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| import javax.annotation.Priority; | ||
| import javax.enterprise.context.Dependent; | ||
| import javax.enterprise.context.spi.CreationalContext; | ||
|
|
@@ -58,6 +59,8 @@ | |
|
|
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| /** | ||
| * @author <a href="mailto:[email protected]">Martin Večeřa</a> | ||
| * Changes in version resolution in lookupMicroservice | ||
| * @author Slavomir Krupa ([email protected]) | ||
| */ | ||
| public class CdiMicroserviceProvider implements MicroserviceProvider, CdiSilverService { | ||
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@@ -134,15 +137,18 @@ public void run() { | |
| @Override | ||
| @SuppressWarnings("checkstyle:JavadocMethod") | ||
| public Set<Object> lookupMicroservice(final MicroserviceMetaData microserviceMetaData) { | ||
| // name can not be null - contract of MicroserviceMetaData | ||
| final String name = microserviceMetaData.getName(); | ||
| final Class<?> type = microserviceMetaData.getType(); | ||
| final Set<Annotation> qualifiers = microserviceMetaData.getQualifiers(); | ||
| final String apiVersion = microserviceMetaData.getApiVersion(); | ||
| final Set<Object> matchingBeansByName = new HashSet<>(); | ||
| final Set<Object> matchingBeansByType = new HashSet<>(); | ||
| boolean wasAlternative = false; | ||
|
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| /* | ||
| We are in search for a CDI bean that meets the provided meta-data. | ||
| If there is a MicroserviceVersion annotation and it is not matching the version in metadata we skip that bean automatically. | ||
| Input and corresponding output is as follows: | ||
| * name specified in MicroserviceReference or derived from data type (both class or interface) | ||
| * beans having the same name in Microservice annotation | ||
|
|
@@ -157,33 +163,39 @@ public Set<Object> lookupMicroservice(final MicroserviceMetaData microserviceMet | |
| for (final Bean<?> bean : beans) { | ||
| if (bean.getBeanClass().isAnnotationPresent(Microservice.class) && !(bean instanceof MicroserviceProxyBean)) { | ||
| final Bean<?> theBean = beanManager.resolve(Collections.singleton(bean)); | ||
|
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| if (theBean.getBeanClass().isAnnotationPresent(MicroserviceVersion.class)) { | ||
| final MicroserviceVersion versionAnnotation = theBean.getBeanClass().getAnnotation(MicroserviceVersion.class); | ||
| String implementationVersion = versionAnnotation.implementation(); | ||
| if (!VersionComparator.forVersion(implementationVersion).satisfies(apiVersion)) { | ||
| continue; | ||
| } | ||
| } | ||
| final Microservice microserviceAnnotation = theBean.getBeanClass().getAnnotation(Microservice.class); | ||
|
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| if (name != null) { | ||
| if ((!microserviceAnnotation.value().isEmpty() && name.equals(microserviceAnnotation.value())) || | ||
| (microserviceAnnotation.value().isEmpty() && name.equals(theBean.getName()))) { | ||
| matchingBeansByName.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| } else if (type.isAssignableFrom(theBean.getBeanClass())) { | ||
| final Set<Annotation> qualifiersToCompare = new HashSet<>(theBean.getQualifiers()); | ||
| qualifiers.stream().forEach(qualifiersToCompare::remove); | ||
|
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| if (qualifiersToCompare.size() == 0) { | ||
|
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| if (bean.isAlternative()) { | ||
| if (!wasAlternative) { | ||
| matchingBeansByType.clear(); | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| wasAlternative = true; | ||
| } else { | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| throw new IllegalStateException(String.format("There are more than alternate beans matching the query: %s. The beans are: %s.", microserviceMetaData.toString(), matchingBeansByType.toString())); | ||
| } | ||
| if ((!microserviceAnnotation.value().isEmpty() && name.equals(microserviceAnnotation.value())) || | ||
| (microserviceAnnotation.value().isEmpty() && name.equals(theBean.getName()))) { | ||
| matchingBeansByName.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| } else if (type.isAssignableFrom(theBean.getBeanClass())) { | ||
| final Set<Annotation> qualifiersToCompare = new HashSet<>(theBean.getQualifiers()); | ||
| qualifiers.stream().forEach(qualifiersToCompare::remove); | ||
|
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| if (qualifiersToCompare.size() == 0) { | ||
|
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| if (bean.isAlternative()) { | ||
| if (!wasAlternative) { | ||
| matchingBeansByType.clear(); | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| wasAlternative = true; | ||
| } else { | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| throw new IllegalStateException(String.format("There are more than alternate beans matching the query: %s. The beans are: %s.", microserviceMetaData.toString(), matchingBeansByType.toString())); | ||
| } | ||
| } else { | ||
| if (!wasAlternative) { | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| } else { | ||
| if (!wasAlternative) { | ||
| matchingBeansByType.add(beanManager.getReference(theBean, type, beanManager.createCreationalContext(theBean))); | ||
| } else { | ||
| // ignore this bean | ||
| } | ||
| // ignore this bean | ||
| } | ||
| } | ||
| } | ||
|
|
@@ -223,7 +235,7 @@ public <T> T lookupBean(final Class<T> type) { | |
| @Override | ||
| public <T> T findByType(final Class<T> type) { | ||
| final BeanManager beanManager = (BeanManager) this.context.getProperties().get(BEAN_MANAGER); | ||
| final Set<T> beans = new HashSet<T>(); | ||
| final Set<T> beans = new HashSet<>(); | ||
| final Set<Bean<?>> definitions = beanManager.getBeans(type); | ||
| final Bean<?> bean = beanManager.resolve(definitions); | ||
| final CreationalContext<?> creationalContext = beanManager.createCreationalContext(bean); | ||
|
|
@@ -259,7 +271,7 @@ public Object log(final InvocationContext ic) throws Exception { | |
| } | ||
| } | ||
|
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| @SuppressWarnings({"unused", "checkstyle:JavadocType"}) | ||
| @SuppressWarnings({ "unused", "checkstyle:JavadocType" }) | ||
| @Microservice | ||
| public static class SilverWareConfiguration implements Configuration { | ||
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@@ -275,7 +287,7 @@ public void eventObserver(@Observes final MicroservicesInitEvent event) { | |
| } | ||
| } | ||
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| @SuppressWarnings({"unused", "unchecked", "checkstyle:JavadocType"}) | ||
| @SuppressWarnings({ "unused", "unchecked", "checkstyle:JavadocType" }) | ||
| @Microservice | ||
| public static class SilverWareStorage implements Storage { | ||
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@@ -305,7 +317,7 @@ public void eventObserver(@Observes final MicroservicesInitEvent event) { | |
| } | ||
| } | ||
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| @SuppressWarnings({"unused", "checkstyle:JavadocMethod"}) | ||
| @SuppressWarnings({ "unused", "checkstyle:JavadocMethod" }) | ||
| @Microservice | ||
| public static class SilverWareCurrentContext implements CurrentContext { | ||
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