merged from trunk after classpath scanning fix

git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/branches/common/common-scope/1.0@58260 82a268e6-3cf1-43bd-a215-b396298e98cf
This commit is contained in:
fabio.simeoni 2012-09-12 21:55:02 +00:00
parent 8610d6f0ec
commit 39ba616ccb
12 changed files with 153 additions and 71 deletions

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@ -1,21 +0,0 @@
package org.gcube.common.scope.api;
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;
/**
* Marks a {@link ScopeProvider} implementations to use in place of {@link DefaultScopeProvider}
*
* @author Fabio Simeoni
*
*/
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.TYPE})
@Inherited
@Documented
public @interface DefaultScopeProvider {}

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@ -13,16 +13,16 @@ import org.slf4j.LoggerFactory;
* @see ScopeProviderScanner * @see ScopeProviderScanner
* *
*/ */
public class DefaultScopeProviderImpl implements ScopeProvider { public class DefaultScopeProvider implements ScopeProvider {
/** System property for scope */ /** System property for scope */
public static final String SCOPE_PROPERTY = "gcube.scope"; public static final String SCOPE_PROPERTY = "gcube.scope";
private static Logger log = LoggerFactory.getLogger(DefaultScopeProviderImpl.class); private static Logger log = LoggerFactory.getLogger(DefaultScopeProvider.class);
private InheritableThreadLocal<String> scopes = new InheritableThreadLocal<String>(); private InheritableThreadLocal<String> scopes = new InheritableThreadLocal<String>();
protected DefaultScopeProviderImpl() {}; protected DefaultScopeProvider() {};
@Override @Override
public String get() { public String get() {

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@ -1,13 +1,11 @@
package org.gcube.common.scope.impl; package org.gcube.common.scope.impl;
import java.util.Set; import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.ServiceLoader;
import org.gcube.common.scope.api.DefaultScopeProvider;
import org.gcube.common.scope.api.ScopeProvider; import org.gcube.common.scope.api.ScopeProvider;
import org.reflections.Reflections;
import org.reflections.scanners.SubTypesScanner;
import org.reflections.util.ClasspathHelper;
import org.reflections.util.ConfigurationBuilder;
import org.slf4j.Logger; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import org.slf4j.LoggerFactory;
@ -31,31 +29,27 @@ public class ScopeProviderScanner {
public static ScopeProvider provider() { public static ScopeProvider provider() {
try { try {
// we include urls specified in manifest files, which is required ScopeProvider impl = null;
// when we run tests in surefire's forked-mode
ConfigurationBuilder builder = new ConfigurationBuilder().setUrls(
ClasspathHelper.forManifest(Utils.urlsToScan())).setScanners(new SubTypesScanner());
Reflections reflections = new Reflections(builder);
Set<Class<? extends ScopeProvider>> impls =
reflections.getSubTypesOf(ScopeProvider.class);
ScopeProvider defaultProvider = null;
for (Class<? extends ScopeProvider> impl : impls)
if (impl.isAnnotationPresent(DefaultScopeProvider.class))
if (defaultProvider==null)
defaultProvider = impl.newInstance();
else
throw new Exception("mis-configured environment: detected multiple deafult providers among "+impls);
if (defaultProvider==null) { ServiceLoader<ScopeProvider> loader = ServiceLoader.load(ScopeProvider.class);
log.info("using default scope provider");
defaultProvider = new DefaultScopeProviderImpl(); Iterator<ScopeProvider> iterator = loader.iterator();
List<ScopeProvider> impls = new ArrayList<ScopeProvider>();
while(iterator.hasNext())
impls.add(iterator.next());
if (impls.size()==0) {
impl = new DefaultScopeProvider();
} }
else if (impls.size()>1)
throw new Exception("mis-configured environment: detected multiple default providers "+impls);
else
impl=impls.get(0);
log.info("using scope provider "+impl);
return defaultProvider; return impl;
} catch (Exception e) { } catch (Exception e) {

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@ -0,0 +1 @@
org.acme.AlternativeProvider

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@ -0,0 +1,26 @@
package org.acme;
import org.gcube.common.scope.api.ScopeProvider;
public class AlternativeProvider implements ScopeProvider {
@Override
public String get() {
// TODO Auto-generated method stub
return null;
}
@Override
public void set(String scope) {
// TODO Auto-generated method stub
}
@Override
public void reset() {
// TODO Auto-generated method stub
}
}

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@ -0,0 +1 @@
org.acme2.YetAnotherAlternativeProvider

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@ -0,0 +1,25 @@
package org.acme2;
import org.gcube.common.scope.api.ScopeProvider;
public class YetAnotherAlternativeProvider implements ScopeProvider {
@Override
public String get() {
// TODO Auto-generated method stub
return null;
}
@Override
public void set(String scope) {
// TODO Auto-generated method stub
}
@Override
public void reset() {
// TODO Auto-generated method stub
}
}

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@ -0,0 +1,56 @@
package org.gcube.common.scope;
import static org.junit.Assert.*;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import org.gcube.common.scope.api.ScopeProvider;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class BadConfigurationTest {
private ClassLoader loader;
@Before
public void init() {
loader = Thread.currentThread().getContextClassLoader();
}
@Test
public void multipleAlternativeProvidersCannotBeConfigured() {
try {
addJarsToClasspath("alternativeprovider.jar","yetanotheralternativeprovider.jar");
ScopeProvider.instance.set("shouldfail");
}
catch(Error e) {
return;
}
fail();
}
private void addJarsToClasspath(String ... jars) {
List<URL> jarUrls = new ArrayList<URL>();
for (String jar : jars)
jarUrls.add(loader.getResource(jar));
URLClassLoader urlClassLoader
= new URLClassLoader(jarUrls.toArray(new URL[0]),loader);
Thread.currentThread().setContextClassLoader(urlClassLoader);
}
@After
public void teardown() {
Thread.currentThread().setContextClassLoader(loader);
}
}

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@ -4,44 +4,44 @@ import static org.junit.Assert.*;
import java.net.URL; import java.net.URL;
import java.net.URLClassLoader; import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import org.gcube.common.scope.api.ScopeProvider; import org.gcube.common.scope.api.ScopeProvider;
import org.junit.After; import org.junit.After;
import org.junit.Before;
import org.junit.Test; import org.junit.Test;
public class ConfigurationTest { public class ConfigurationTest {
private ClassLoader loader = Thread.currentThread().getContextClassLoader(); private ClassLoader loader;
@Before
public void init() {
loader = Thread.currentThread().getContextClassLoader();
}
@Test @Test
public void alternativeProvidersCanBeConfigured() { public void alternativeProvidersCanBeConfigured() {
addJarToClasspath("alternativeprovider.jar"); addJarsToClasspath("alternativeprovider.jar");
assertEquals("AlternativeScopeProvider",ScopeProvider.instance.getClass().getSimpleName()); assertEquals("AlternativeProvider",ScopeProvider.instance.getClass().getSimpleName());
} }
@Test
public void multipleAlternativeProvidersCannotBeConfigured() {
try {
addJarToClasspath("multiplealternativeproviders.jar");
ScopeProvider.instance.set("shouldfail");
fail();
}
catch(Error e) {}
}
private void addJarToClasspath(String jar) {
private void addJarsToClasspath(String ... jars) {
URL jarURL = loader.getResource(jar);
List<URL> jarUrls = new ArrayList<URL>();
for (String jar : jars)
jarUrls.add(loader.getResource(jar));
URLClassLoader urlClassLoader URLClassLoader urlClassLoader
= new URLClassLoader(new URL[]{jarURL},loader); = new URLClassLoader(jarUrls.toArray(new URL[0]),loader);
Thread.currentThread().setContextClassLoader(urlClassLoader); Thread.currentThread().setContextClassLoader(urlClassLoader);
} }
@After @After

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