branch for 1.0.x releases (first created for gCube 2.10.0)

git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/branches/common/common-scope/1.0@57622 82a268e6-3cf1-43bd-a215-b396298e98cf
This commit is contained in:
fabio.simeoni 2012-09-05 09:50:08 +00:00
commit 8610d6f0ec
27 changed files with 867 additions and 0 deletions

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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" output="target/classes" path="src/main/java"/>
<classpathentry excluding="**" kind="src" output="target/classes" path="src/main/resources"/>
<classpathentry kind="src" output="target/test-classes" path="src/test/java"/>
<classpathentry excluding="**" kind="src" output="target/test-classes" path="src/test/resources"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.6"/>
<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER"/>
<classpathentry kind="output" path="target/classes"/>
</classpath>

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<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>common-scope</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
<buildCommand>
<name>org.eclipse.m2e.core.maven2Builder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
<nature>org.eclipse.m2e.core.maven2Nature</nature>
</natures>
</projectDescription>

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gCube System - License
------------------------------------------------------------
The gCube/gCore software is licensed as Free Open Source software conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
The software and documentation is provided by its authors/distributors "as is" and no expressed or
implied warranty is given for its use, quality or fitness for a particular case.

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* Fabio Simeoni (fabio.simeoni@fao.org), FAO of the UN, Italy

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The gCube System - ${name}
----------------------
This work has been partially supported by the following European projects: DILIGENT (FP6-2003-IST-2), D4Science (FP7-INFRA-2007-1.2.2),
D4Science-II (FP7-INFRA-2008-1.2.2), iMarine (FP7-INFRASTRUCTURES-2011-2), and EUBrazilOpenBio (FP7-ICT-2011-EU-Brazil).
Authors
-------
* Fabio Simeoni (fabio.simeoni@fao.org), FAO of the UN, Italy.
Version and Release Date
------------------------
${version}
Description
-----------
${description}
Download information
--------------------
Source code is available from SVN:
${scm.url}
Binaries can be downloaded from:
Documentation
-------------
Documentation is available on-line from the Projects Documentation Wiki:
https://gcube.wiki.gcube-system.org/gcube/index.php/Integration_and_Interoperability_Facilities_Framework:_Client_Libraries_Design_Model#Scope_Management
Licensing
---------
This software is licensed under the terms you may find in the file named "LICENSE" in this directory.

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<ReleaseNotes>
<Changeset component="${build.finalName}" date="">
<Change>First Release</Change>
</Changeset>
</ReleaseNotes>

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<assembly
xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0 http://maven.apache.org/xsd/assembly-1.1.0.xsd">
<id>servicearchive</id>
<formats>
<format>tar.gz</format>
</formats>
<baseDirectory>/</baseDirectory>
<fileSets>
<fileSet>
<directory>${distroDirectory}</directory>
<outputDirectory>/</outputDirectory>
<useDefaultExcludes>true</useDefaultExcludes>
<includes>
<include>README</include>
<include>LICENSE</include>
<include>INSTALL</include>
<include>MAINTAINERS</include>
<include>changelog.xml</include>
</includes>
<fileMode>755</fileMode>
<filtered>true</filtered>
</fileSet>
</fileSets>
<files>
<file>
<source>${distroDirectory}/profile.xml</source>
<outputDirectory>/etc</outputDirectory>
<filtered>true</filtered>
</file>
<file>
<source>target/${build.finalName}.jar</source>
<outputDirectory>/${artifactId}</outputDirectory>
</file>
<file>
<source>${distroDirectory}/svnpath.txt</source>
<outputDirectory>/${artifactId}</outputDirectory>
<filtered>true</filtered>
</file>
</files>
</assembly>

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<?xml version="1.0" encoding="UTF-8"?>
<Resource xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<ID />
<Type>Service</Type>
<Profile>
<Description>${description}</Description>
<Class>Common</Class>
<Name>${artifactId}</Name>
<Version>1.0.0</Version>
<Packages>
<Software>
<Name>${artifactId}</Name>
<Version>${version}</Version>
<MavenCoordinates>
<groupId>${groupId}</groupId>
<artifactId>${artifactId}</artifactId>
<version>${version}</version>
</MavenCoordinates>
<Files>
<File>${build.finalName}.jar</File>
</Files>
</Software>
</Packages>
</Profile>
</Resource>

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${scm.url}

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>maven-parent</artifactId>
<groupId>org.gcube.tools</groupId>
<version>1.0.0</version>
<relativePath />
</parent>
<groupId>org.gcube.core</groupId>
<artifactId>common-scope</artifactId>
<version>1.0.0-SNAPSHOT</version>
<name>Common Scope</name>
<description>Scope-related APIs</description>
<properties>
<distroDirectory>distro</distroDirectory>
</properties>
<scm>
<connection>scm:svn:http://svn.d4science.research-infrastructures.eu/gcube/trunk/Common/${project.artifactId}</connection>
<developerConnection>scm:svn:https://svn.d4science.research-infrastructures.eu/gcube/trunk/Common/${project.artifactId}</developerConnection>
<url>http://svn.d4science.research-infrastructures.eu/gcube/trunk/Common/${project.artifactId}</url>
</scm>
<dependencies>
<dependency>
<groupId>org.reflections</groupId>
<artifactId>reflections</artifactId>
<version>0.9.6</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.4</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.4</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.5</version>
<executions>
<execution>
<id>copy-profile</id>
<phase>install</phase>
<goals>
<goal>copy-resources</goal>
</goals>
<configuration>
<outputDirectory>target</outputDirectory>
<resources>
<resource>
<directory>${distroDirectory}</directory>
<filtering>true</filtering>
<includes>
<include>profile.xml</include>
</includes>
</resource>
</resources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptors>
<descriptor>${distroDirectory}/descriptor.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>servicearchive</id>
<phase>install</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>

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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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package org.gcube.common.scope.api;
import org.gcube.common.scope.impl.ScopeProviderScanner;
/**
* Provides a scope in the caller's context.
*
* @author Fabio Simeoni
*
*/
public interface ScopeProvider {
/**
* Shared {@link ScopeProvider}.
*/
public static final ScopeProvider instance = ScopeProviderScanner.provider();
/**
* Returns the scope in the caller's context.
* @return the scope
*/
String get();
/**
* Sets the scope in the caller's context.
* @param scope the scope
*/
void set(String scope);
/**
* Resets the scope in the caller's context.
*/
void reset();
}

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package org.gcube.common.scope.api;
import java.util.List;
import org.gcube.common.scope.impl.ScopedServiceMap;
/**
* Resolves service endpoints statically configured for a given scope.
*
* @author Fabio Simeoni
*
*/
public interface ServiceMap {
/**
* Shared {@link ServiceMap}.
*/
public static final ServiceMap instance = new ScopedServiceMap();
/**
* Returns the endpoints of a given service.
* @param service the service
* @return the endpoints, or <code>null</code> if the service is unknown.
*/
List<String> endpoint(String service);
/**
* Returns the associated scope.
* @return the scope
*/
String scope();
}

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package org.gcube.common.scope.impl;
import org.gcube.common.scope.api.ScopeProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A {@link ScopeProvider} that uses threads as contexts.
* <p>
* Relies an an internal {@link InheritableThreadLocal}.
*
* @author Fabio Simeoni
* @see ScopeProviderScanner
*
*/
public class DefaultScopeProviderImpl implements ScopeProvider {
/** System property for scope */
public static final String SCOPE_PROPERTY = "gcube.scope";
private static Logger log = LoggerFactory.getLogger(DefaultScopeProviderImpl.class);
private InheritableThreadLocal<String> scopes = new InheritableThreadLocal<String>();
protected DefaultScopeProviderImpl() {};
@Override
public String get() {
String scope = scopes.get();
if (scope==null)
scope = System.getProperty(SCOPE_PROPERTY);
return scope;
}
@Override
public void set(String scope) {
if (scope!=null)
log.info("setting scope {} in thread {}",scope,Thread.currentThread().getId());
scopes.set(scope);
}
@Override
public void reset() {
log.info("resetting scope in thread {}",Thread.currentThread().getId());
scopes.remove();
}
}

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package org.gcube.common.scope.impl;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import org.gcube.common.scope.api.ServiceMap;
/**
* A {@link ServiceMap} with a standard XML binding.
*
* @author Fabio Simeoni
*
*/
@XmlRootElement(name="service-map")
public class DefaultServiceMap implements ServiceMap {
@XmlAttribute
private String scope;
@XmlJavaTypeAdapter(ServiceMapAdapter.class)
Map<String,List<String>> services = new LinkedHashMap<String,List<String>>();
@Override
public String scope() {
return scope;
}
@Override
public List<String> endpoint(String service) {
return services.get(service);
}
}

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package org.gcube.common.scope.impl;
import java.util.Set;
import org.gcube.common.scope.api.DefaultScopeProvider;
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.LoggerFactory;
/**
* Scans the classpath for a {@link ScopeProvider} implementation.
* <p>
* Returns a shared {@link DefaultScopeProvider} by default.
*
* @author Fabio Simeoni
* @see ScopeProvider
* @see ScopeProvider#instance
*/
public class ScopeProviderScanner {
private static Logger log = LoggerFactory.getLogger(ScopeProviderScanner.class);
/**
* Returns the configured provider.
* @return the provider
*/
public static ScopeProvider provider() {
try {
// we include urls specified in manifest files, which is required
// 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) {
log.info("using default scope provider");
defaultProvider = new DefaultScopeProviderImpl();
}
return defaultProvider;
} catch (Exception e) {
throw new RuntimeException("could not configure scope provider", e);
}
}
}

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package org.gcube.common.scope.impl;
import java.util.List;
import java.util.Map;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.common.scope.api.ServiceMap;
/**
* A {@link ServiceMap} that forwards requests to {@link ServiceMap}s associated
* with the scope of callers.
* <p>
* At construction time, it configures itself with all the service maps found
* the classpath (excluding URLs available to primordial and extension
* classloader). Recognises service maps as resources whose names match a
* {@link ServiceMapScanner#mapConfigPattern}.
*
* @author Fabio Simeoni
*
*/
public class ScopedServiceMap implements ServiceMap {
private final Map<String, ServiceMap> maps;
public ScopedServiceMap() {
maps = ServiceMapScanner.maps();
}
@Override
public String scope() {
return ScopeProvider.instance.get();
}
@Override
public List<String> endpoint(String service) {
String currentScope = scope();
ServiceMap map = maps.get(currentScope);
return map == null ? null : map.endpoint(service);
}
}

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package org.gcube.common.scope.impl;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlAdapter;
/**
* Adapts the JAXB-binding for {@link DefaultServiceMap}.
*
* @author Fabio Simeoni
*
*/
public class ServiceMapAdapter extends XmlAdapter<ServiceMapAdapter.ValueServiceMap,Map<String,List<String>>> {
@XmlRootElement(name="services")
static class ValueServiceMap {
@XmlElement(name="service")
Set<ServiceEntry> services;
}
static class ServiceEntry {
@XmlAttribute
private String name;
@XmlElement(name="endpoint")
private List<String> endpoints;
}
@Override
public Map<String, List<String>> unmarshal(ValueServiceMap valueMap) throws Exception {
Map<String, List<String>> map = new LinkedHashMap<String,List<String>>();
for (ServiceEntry service : valueMap.services)
map.put(service.name,service.endpoints);
return map;
}
@Override
public ValueServiceMap marshal(Map<String, List<String>> map) throws Exception {
ValueServiceMap valueMap = new ValueServiceMap();
for (Map.Entry<String,List<String>> e : map.entrySet()) {
ServiceEntry entry = new ServiceEntry();
entry.name=e.getKey();
entry.endpoints = e.getValue();
}
return valueMap;
}
}

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package org.gcube.common.scope.impl;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Pattern;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;
import org.gcube.common.scope.api.ServiceMap;
import org.reflections.Reflections;
import org.reflections.scanners.ResourcesScanner;
import org.reflections.util.ClasspathHelper;
import org.reflections.util.ConfigurationBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Scans the classpath for {@link ServiceMap}s.
* @author Fabio Simeoni
*
*/
class ServiceMapScanner {
private static Logger log = LoggerFactory.getLogger(ServiceMapScanner.class);
/**
* The path used to find service map configuration files.
*/
static final String mapConfigPattern = ".*\\.servicemap";
/**
* Scans the classpath for {@link ServiceMap}s.
*/
static Map<String, ServiceMap> maps() {
Map<String, ServiceMap> maps = new HashMap<String, ServiceMap>();
try {
JAXBContext context = JAXBContext
.newInstance(DefaultServiceMap.class);
Unmarshaller um = context.createUnmarshaller();
// we include urls specified in manifest files, which is required
// when we run tests in surefire's forked-mode
ConfigurationBuilder builder = new ConfigurationBuilder().setUrls(
ClasspathHelper.forManifest(Utils.urlsToScan())).setScanners(
new ResourcesScanner());
Reflections reflections = new Reflections(builder);
for (String resource : reflections.getResources(Pattern
.compile(mapConfigPattern))) {
URL url = Thread.currentThread().getContextClassLoader()
.getResource(resource);
log.trace("loading {} ", url);
DefaultServiceMap map = (DefaultServiceMap) um.unmarshal(url);
maps.put(map.scope(), map);
}
} catch (Exception e) {
throw new RuntimeException("could not load service maps", e);
}
return maps;
}
}

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package org.gcube.common.scope.impl;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Set;
import com.google.common.collect.Sets;
/**
* Classpath discovery utils.
*
* @author Fabio Simeoni
*
*/
public class Utils {
// helper: we use reflections' code but exclude extension and primordial
// classloaders
// whose URLs we do not want to include. especially because these may have
// non-standard URLs
// that would need to be excluded individually from standard scanning,
// or reflections will show (but ignore) a horrible error in the logs. and
// we do no know how to predict what we will
// find on any given machine
static Set<URL> urlsToScan() {
final Set<URL> result = Sets.newHashSet();
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
while (classLoader != null && classLoader.getParent() != null) {
if (classLoader instanceof URLClassLoader) {
URL[] urls = ((URLClassLoader) classLoader).getURLs();
if (urls != null) {
result.addAll(Sets.<URL> newHashSet(urls));
}
}
classLoader = classLoader.getParent();
}
return result;
}
}

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package org.gcube.common.scope;
import static org.junit.Assert.*;
import java.net.URL;
import java.net.URLClassLoader;
import org.gcube.common.scope.api.ScopeProvider;
import org.junit.After;
import org.junit.Test;
public class ConfigurationTest {
private ClassLoader loader = Thread.currentThread().getContextClassLoader();
@Test
public void alternativeProvidersCanBeConfigured() {
addJarToClasspath("alternativeprovider.jar");
assertEquals("AlternativeScopeProvider",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) {
URL jarURL = loader.getResource(jar);
URLClassLoader urlClassLoader
= new URLClassLoader(new URL[]{jarURL},loader);
Thread.currentThread().setContextClassLoader(urlClassLoader);
}
@After
public void teardown() {
Thread.currentThread().setContextClassLoader(loader);
}
}

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package org.gcube.common.scope;
import static org.junit.Assert.*;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;
import org.gcube.common.scope.api.ScopeProvider;
import org.junit.Test;
public class ProviderTest {
@Test
public void scopesAreThreadInherited() throws Exception {
final ScopeProvider provider = ScopeProvider.instance;
provider.set("scope");
final CountDownLatch latch = new CountDownLatch(1);
new Thread() {
public void run() {
assertNotNull(provider.get());
latch.countDown();
};
}.start();
if (!latch.await(100, TimeUnit.MILLISECONDS))
fail("scope was null in testing thread");
}
}

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package org.gcube.common.scope;
import static org.junit.Assert.*;
import java.io.StringReader;
import java.util.Arrays;
import java.util.List;
import javax.xml.bind.JAXBContext;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.common.scope.api.ServiceMap;
import org.gcube.common.scope.impl.DefaultServiceMap;
import org.junit.After;
import org.junit.Test;
public class ServiceMapTest {
private static String map = "<service-map scope='scope'>" + "<services>"
+ "<service name='service1'>"
+ "<endpoint>http://acme.org:8000/service1</endpoint>"
+ "<endpoint>http://acme2.org:8000/service1</endpoint>"
+ "</service>" + "<service name='service2'>"
+ "<endpoint>http://acme3.org:8000/service2</endpoint>"
+ "<endpoint>http://acme4.org:8000/service2</endpoint>"
+ "</service>" + "</services>" + "</service-map>";
@Test
public void serviceMapsBindCorrectly() throws Exception {
JAXBContext context = JAXBContext.newInstance(DefaultServiceMap.class);
DefaultServiceMap serviceMap = (DefaultServiceMap) context
.createUnmarshaller().unmarshal(new StringReader(map));
assertEquals("scope", serviceMap.scope());
List<String> expected = Arrays.asList("http://acme.org:8000/service1","http://acme2.org:8000/service1");
assertEquals(expected, serviceMap.endpoint("service1"));
expected = Arrays.asList("http://acme3.org:8000/service2","http://acme4.org:8000/service2");
assertEquals(expected, serviceMap.endpoint("service2"));
}
@Test
public void serviceMapsDiscoveredCorrectly() throws Exception {
ScopeProvider.instance.set("scope");
assertNotNull(ServiceMap.instance.endpoint("service1"));
}
@After
public void cleanup() {
ScopeProvider.instance.reset();
}
}

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<service-map scope='scope'><services><service name='service1'><endpoint>http://acme.org:8000/service1</endpoint><endpoint>http://acme2.org:8000/service1</endpoint></service><service name='service2'><endpoint>http://acme3.org:8000/service2</endpoint><endpoint>http://acme4.org:8000/service2</endpoint></service></services></service-map>