mirror of https://github.com/apache/jclouds.git
MetadataBundleListener now works with multiple providers/apis per bundle. Added a class assignable check in MetadataBundleListener. Added unit test for MetadataBundleListener. Fixed spelling and formatting of MetadataBundleListener and MetadataBundleListenerTest.
This commit is contained in:
Ioannis Canellos
parent
e9edce7bae
commit
f49cca46f0
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@ -19,7 +19,10 @@
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package org.jclouds.osgi;
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import com.google.common.base.Charsets;
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import com.google.common.collect.ArrayListMultimap;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Multimap;
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import com.google.common.io.Closeables;
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import org.jclouds.apis.ApiMetadata;
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import org.jclouds.apis.ApiRegistry;
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import org.jclouds.providers.ProviderMetadata;
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@ -33,8 +36,8 @@ import java.io.BufferedReader;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.net.URL;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Collection;
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import java.util.List;
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/**
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* A {@link BundleListener} that listens for {@link BundleEvent} and searches for {@link org.jclouds.providers.ProviderMetadata} and {@link org.jclouds.apis.ApiMetadata} in newly
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@ -43,168 +46,183 @@ import java.util.Map;
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*/
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public class MetadataBundleListener implements BundleListener {
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private Map<Long, ProviderMetadata> providerMetadataMap = new HashMap<Long, ProviderMetadata>();
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private Map<Long, ApiMetadata> apiMetadataMap = new HashMap<Long, ApiMetadata>();
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private Multimap<Long, ProviderMetadata> providerMetadataMap = ArrayListMultimap.create();
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private Multimap<Long, ApiMetadata> apiMetadataMap = ArrayListMultimap.create();
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public void start(BundleContext bundleContext) {
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bundleContext.addBundleListener(this);
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for (Bundle bundle : bundleContext.getBundles()) {
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if (bundle.getState() == Bundle.ACTIVE) {
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ProviderMetadata providerMetadata = getProviderMetadata(bundle);
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ApiMetadata apiMetadata = getApiMetadata(bundle);
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public void start(BundleContext bundleContext) {
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bundleContext.addBundleListener(this);
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for (Bundle bundle : bundleContext.getBundles()) {
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if (bundle.getState() == Bundle.ACTIVE) {
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List<ProviderMetadata> providerMetadataList = getProviderMetadata(bundle);
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List<ApiMetadata> apiMetadataList = getApiMetadata(bundle);
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if (providerMetadata != null) {
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ProviderRegistry.registerProvider(providerMetadata);
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providerMetadataMap.put(bundle.getBundleId(), providerMetadata);
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}
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if (apiMetadata != null) {
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ApiRegistry.registerApi(apiMetadata);
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apiMetadataMap.put(bundle.getBundleId(), apiMetadata);
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}
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for (ProviderMetadata providerMetadata : providerMetadataList) {
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if (providerMetadata != null) {
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ProviderRegistry.registerProvider(providerMetadata);
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providerMetadataMap.put(bundle.getBundleId(), providerMetadata);
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}
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}
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for (ApiMetadata apiMetadata : apiMetadataList) {
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if (apiMetadata != null) {
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ApiRegistry.registerApi(apiMetadata);
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apiMetadataMap.put(bundle.getBundleId(), apiMetadata);
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}
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}
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}
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}
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}
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}
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}
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public void stop(BundleContext bundleContext) {
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providerMetadataMap.clear();
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apiMetadataMap.clear();
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}
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public void stop(BundleContext bundleContext) {
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providerMetadataMap.clear();
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apiMetadataMap.clear();
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}
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@Override
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public void bundleChanged(BundleEvent event) {
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ProviderMetadata providerMetadata;
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ApiMetadata apiMetadata;
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switch (event.getType()) {
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case BundleEvent.STARTED:
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providerMetadata = getProviderMetadata(event.getBundle());
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apiMetadata = getApiMetadata(event.getBundle());
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if (providerMetadata != null) {
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ProviderRegistry.registerProvider(providerMetadata);
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providerMetadataMap.put(event.getBundle().getBundleId(), providerMetadata);
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}
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if (apiMetadata != null) {
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ApiRegistry.registerApi(apiMetadata);
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apiMetadataMap.put(event.getBundle().getBundleId(), apiMetadata);
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}
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break;
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case BundleEvent.STOPPING:
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case BundleEvent.STOPPED:
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providerMetadata = providerMetadataMap.get(event.getBundle().getBundleId());
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apiMetadata = apiMetadataMap.get(event.getBundle().getBundleId());
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if (providerMetadata != null) {
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ProviderRegistry.unregisterProvider(providerMetadata);
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}
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if (apiMetadata != null) {
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ApiRegistry.unRegisterApi(apiMetadata);
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}
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break;
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}
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}
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@Override
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public void bundleChanged(BundleEvent event) {
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Collection<ProviderMetadata> providerMetadataList = null;
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Collection<ApiMetadata> apiMetadataList = null;
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switch (event.getType()) {
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case BundleEvent.STARTED:
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providerMetadataList = getProviderMetadata(event.getBundle());
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apiMetadataList = getApiMetadata(event.getBundle());
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for (ProviderMetadata providerMetadata : providerMetadataList) {
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if (providerMetadata != null) {
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ProviderRegistry.registerProvider(providerMetadata);
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providerMetadataMap.put(event.getBundle().getBundleId(), providerMetadata);
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}
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}
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for (ApiMetadata apiMetadata : apiMetadataList) {
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if (apiMetadata != null) {
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ApiRegistry.registerApi(apiMetadata);
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apiMetadataMap.put(event.getBundle().getBundleId(), apiMetadata);
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}
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}
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break;
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case BundleEvent.STOPPING:
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case BundleEvent.STOPPED:
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providerMetadataList = providerMetadataMap.get(event.getBundle().getBundleId());
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apiMetadataList = apiMetadataMap.get(event.getBundle().getBundleId());
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if (providerMetadataList != null) {
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for (ProviderMetadata providerMetadata : providerMetadataList) {
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ProviderRegistry.unregisterProvider(providerMetadata);
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}
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}
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if (apiMetadataList != null) {
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for (ApiMetadata apiMetadata : apiMetadataList) {
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ApiRegistry.unRegisterApi(apiMetadata);
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}
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}
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break;
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}
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}
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/**
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* Creates an instance of {@link ProviderMetadata} from the {@link Bundle}.
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*
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* @param bundle
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* @return
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*/
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public List<ProviderMetadata> getProviderMetadata(Bundle bundle) {
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List<ProviderMetadata> metadataList = Lists.newArrayList();
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String classNames = getProviderMetadataClassNames(bundle);
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if (classNames != null && !classNames.isEmpty()) {
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for (String className : classNames.split("\n")) {
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try {
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Class<? extends ProviderMetadata> providerMetadataClass = bundle.loadClass(className);
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//Classes loaded by other class loaders are not assignable.
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if (ProviderMetadata.class.isAssignableFrom(providerMetadataClass)) {
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ProviderMetadata metadata = providerMetadataClass.newInstance();
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metadataList.add(metadata);
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}
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} catch (ClassNotFoundException e) {
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// ignore
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} catch (InstantiationException e) {
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// ignore
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} catch (IllegalAccessException e) {
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// ignore
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}
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}
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}
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return metadataList;
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}
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/**
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* Creates an instance of {@link ApiMetadata} from the {@link Bundle}.
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*
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* @param bundle
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* @return
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*/
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public List<ApiMetadata> getApiMetadata(Bundle bundle) {
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List<ApiMetadata> metadataList = Lists.newArrayList();
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String classNames = getApiMetadataClassNames(bundle);
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if (classNames != null && !classNames.isEmpty()) {
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for (String className : classNames.split("\n")) {
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try {
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Class<? extends ApiMetadata> apiMetadataClass = bundle.loadClass(className);
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//Classes loaded by other class loaders are not assignable.
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if (ApiMetadata.class.isAssignableFrom(apiMetadataClass)) {
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ApiMetadata metadata = apiMetadataClass.newInstance();
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metadataList.add(metadata);
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}
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} catch (ClassNotFoundException e) {
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// ignore
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} catch (InstantiationException e) {
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// ignore
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} catch (IllegalAccessException e) {
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// ignore
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}
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}
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}
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return metadataList;
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}
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public String getMetadataClassNames(Bundle bundle, String pathToMetadata) {
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URL resource = bundle.getEntry(pathToMetadata);
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InputStream is = null;
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InputStreamReader reader = null;
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BufferedReader bufferedReader = null;
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StringBuilder sb = new StringBuilder();
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/**
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* Creates an instance of {@link ProviderMetadata} from the {@link Bundle}.
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*
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* @param bundle
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* @return
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*/
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public ProviderMetadata getProviderMetadata(Bundle bundle) {
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ProviderMetadata metadata = null;
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String className = getProviderMetadataClassName(bundle);
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if (className != null && !className.isEmpty()) {
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try {
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Class<? extends ProviderMetadata> providerMetadataClass = bundle.loadClass(className);
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metadata = providerMetadataClass.newInstance();
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} catch (ClassNotFoundException e) {
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// ignore
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} catch (InstantiationException e) {
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// ignore
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} catch (IllegalAccessException e) {
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// ignore
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}
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}
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return metadata;
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}
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/**
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* Creates an instance of {@link ApiMetadata} from the {@link Bundle}.
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*
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* @param bundle
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* @return
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*/
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public ApiMetadata getApiMetadata(Bundle bundle) {
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ApiMetadata metadata = null;
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String className = getApiMetadataClassName(bundle);
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if (className != null && !className.isEmpty()) {
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try {
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Class<? extends ApiMetadata> apiMetadataClass = bundle.loadClass(className);
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metadata = apiMetadataClass.newInstance();
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} catch (ClassNotFoundException e) {
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// ignore
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} catch (InstantiationException e) {
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// ignore
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} catch (IllegalAccessException e) {
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// ignore
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}
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}
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return metadata;
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}
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public String getMetadataClassName(Bundle bundle, String pathToMetadata) {
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URL resource = bundle.getEntry(pathToMetadata);
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InputStream is = null;
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InputStreamReader reader = null;
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BufferedReader bufferedReader = null;
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StringBuilder sb = new StringBuilder();
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try {
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is = resource.openStream();
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reader = new InputStreamReader(is, Charsets.UTF_8);
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bufferedReader = new BufferedReader(reader);
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String line;
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while ((line = bufferedReader.readLine()) != null) {
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sb.append(line).append("\n");
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}
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} catch (Throwable e) {
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} finally {
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try {
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if (reader != null)
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reader.close();
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} catch (Throwable e) {
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}
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try {
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if (bufferedReader != null)
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bufferedReader.close();
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} catch (Throwable e) {
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}
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try {
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is.close();
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is = resource.openStream();
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reader = new InputStreamReader(is, Charsets.UTF_8);
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bufferedReader = new BufferedReader(reader);
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String line;
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while ((line = bufferedReader.readLine()) != null) {
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sb.append(line).append("\n");
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}
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} catch (Throwable e) {
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} finally {
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Closeables.closeQuietly(reader);
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Closeables.closeQuietly(bufferedReader);
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Closeables.closeQuietly(is);
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}
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return sb.toString().trim();
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}
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}
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return sb.toString().trim();
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}
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/**
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* Retrieves the {@link ProviderMetadata} class name for the bundle if it exists.
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*
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* @param bundle
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* @return
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*/
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public String getProviderMetadataClassNames(Bundle bundle) {
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return getMetadataClassNames(bundle, "/META-INF/services/org.jclouds.providers.ProviderMetadata");
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}
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/**
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* Retrieves the {@link ProviderMetadata} class name for the bundle if it exists.
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*
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* @param bundle
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* @return
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*/
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public String getProviderMetadataClassName(Bundle bundle) {
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return getMetadataClassName(bundle, "/META-INF/services/org.jclouds.providers.ProviderMetadata");
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}
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/**
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* Retrieves the {@link ProviderMetadata} class name for the bundle if it exists.
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*
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* @param bundle
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* @return
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*/
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public String getApiMetadataClassName(Bundle bundle) {
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return getMetadataClassName(bundle, "/META-INF/services/org.jclouds.apis.ApiMetadata");
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}
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/**
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* Retrieves the {@link ProviderMetadata} class name for the bundle if it exists.
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*
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* @param bundle
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* @return
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*/
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public String getApiMetadataClassNames(Bundle bundle) {
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return getMetadataClassNames(bundle, "/META-INF/services/org.jclouds.apis.ApiMetadata");
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}
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}
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@ -0,0 +1,147 @@
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/**
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* Licensed to jclouds, Inc. (jclouds) under one or more
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* contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. jclouds licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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package org.jclouds.osgi;
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import org.jclouds.apis.ApiMetadata;
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import org.jclouds.apis.JcloudsTestBlobStoreApiMetadata;
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import org.jclouds.apis.JcloudsTestComputeApiMetadata;
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import org.jclouds.apis.JcloudsTestYetAnotherComputeApiMetadata;
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import org.jclouds.providers.JcloudsTestBlobStoreProviderMetadata;
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import org.jclouds.providers.JcloudsTestComputeProviderMetadata;
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import org.jclouds.providers.JcloudsTestYetAnotherComputeProviderMetadata;
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import org.jclouds.providers.ProviderMetadata;
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import org.osgi.framework.Bundle;
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import org.testng.annotations.Test;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.util.List;
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import static org.easymock.EasyMock.createMock;
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import static org.easymock.EasyMock.expect;
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import static org.easymock.EasyMock.replay;
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import static org.easymock.EasyMock.verify;
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import static org.testng.Assert.assertEquals;
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import static org.testng.Assert.assertFalse;
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import static org.testng.Assert.assertTrue;
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import static org.testng.Assert.assertNotNull;
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public class MetadataBundleListenerTest {
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@Test
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public void testSanity() throws MalformedURLException, ClassNotFoundException {
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//We are checking here that the class loader we create and use in this test series is indeed different and isolated from our tests classloader.
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ClassLoader loader = createIsolatedClassLoader();
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assertFalse(ProviderMetadata.class.isAssignableFrom(loader.loadClass("org.jclouds.providers.JcloudsTestComputeProviderMetadata")));
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}
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@Test
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public void testGetProviderMetadata() throws Exception {
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MetadataBundleListener listener = new MetadataBundleListener();
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Bundle bundle = createMock(Bundle.class);
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expect(bundle.getEntry("/META-INF/services/org.jclouds.providers.ProviderMetadata")).andReturn(getClass().getResource("/META-INF/services/org.jclouds.providers.ProviderMetadata")).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestBlobStoreProviderMetadata")).andReturn(JcloudsTestBlobStoreProviderMetadata.class).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestComputeProviderMetadata")).andReturn(JcloudsTestComputeProviderMetadata.class).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestYetAnotherComputeProviderMetadata")).andReturn(JcloudsTestYetAnotherComputeProviderMetadata.class).anyTimes();
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replay(bundle);
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List<ProviderMetadata> providerMetadataList = listener.getProviderMetadata(bundle);
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assertNotNull(providerMetadataList);
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assertEquals(3, providerMetadataList.size());
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assertTrue(providerMetadataList.contains(new JcloudsTestBlobStoreProviderMetadata()));
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assertTrue(providerMetadataList.contains(new JcloudsTestComputeProviderMetadata()));
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assertTrue(providerMetadataList.contains(new JcloudsTestYetAnotherComputeProviderMetadata()));
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verify(bundle);
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}
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@Test
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public void testGetProviderMetadataFromMultipleClassLoaders() throws Exception {
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ClassLoader isolatedClassLoader = createIsolatedClassLoader();
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MetadataBundleListener listener = new MetadataBundleListener();
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Bundle bundle = createMock(Bundle.class);
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expect(bundle.getEntry("/META-INF/services/org.jclouds.providers.ProviderMetadata")).andReturn(getClass().getResource("/META-INF/services/org.jclouds.providers.ProviderMetadata")).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestBlobStoreProviderMetadata")).andReturn(isolatedClassLoader.loadClass(JcloudsTestBlobStoreProviderMetadata.class.getName())).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestComputeProviderMetadata")).andReturn(JcloudsTestComputeProviderMetadata.class).anyTimes();
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expect(bundle.loadClass("org.jclouds.providers.JcloudsTestYetAnotherComputeProviderMetadata")).andReturn(JcloudsTestYetAnotherComputeProviderMetadata.class).anyTimes();
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replay(bundle);
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List<ProviderMetadata> providerMetadataList = listener.getProviderMetadata(bundle);
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assertNotNull(providerMetadataList);
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assertEquals(2, providerMetadataList.size());
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assertFalse(providerMetadataList.contains(new JcloudsTestBlobStoreProviderMetadata()));
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assertTrue(providerMetadataList.contains(new JcloudsTestComputeProviderMetadata()));
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assertTrue(providerMetadataList.contains(new JcloudsTestYetAnotherComputeProviderMetadata()));
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verify(bundle);
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}
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@Test
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public void testGetApiMetadata() throws Exception {
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MetadataBundleListener listener = new MetadataBundleListener();
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Bundle bundle = createMock(Bundle.class);
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expect(bundle.getEntry("/META-INF/services/org.jclouds.apis.ApiMetadata")).andReturn(getClass().getResource("/META-INF/services/org.jclouds.apis.ApiMetadata")).anyTimes();
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expect(bundle.loadClass("org.jclouds.apis.JcloudsTestBlobStoreApiMetadata")).andReturn(JcloudsTestBlobStoreApiMetadata.class).anyTimes();
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expect(bundle.loadClass("org.jclouds.apis.JcloudsTestComputeApiMetadata")).andReturn(JcloudsTestComputeApiMetadata.class).anyTimes();
|
||||
expect(bundle.loadClass("org.jclouds.apis.JcloudsTestYetAnotherComputeApiMetadata")).andReturn(JcloudsTestYetAnotherComputeApiMetadata.class).anyTimes();
|
||||
|
||||
replay(bundle);
|
||||
List<ApiMetadata> apiMetadataList = listener.getApiMetadata(bundle);
|
||||
assertNotNull(apiMetadataList);
|
||||
assertEquals(3, apiMetadataList.size());
|
||||
assertTrue(apiMetadataList.contains(new JcloudsTestBlobStoreApiMetadata()));
|
||||
assertTrue(apiMetadataList.contains(new JcloudsTestComputeApiMetadata()));
|
||||
assertTrue(apiMetadataList.contains(new JcloudsTestYetAnotherComputeApiMetadata()));
|
||||
verify(bundle);
|
||||
}
|
||||
|
||||
@Test
|
||||
public void testGetApiMetadataFromMultipleClassLoaders() throws Exception {
|
||||
ClassLoader isolatedClassLoader = createIsolatedClassLoader();
|
||||
MetadataBundleListener listener = new MetadataBundleListener();
|
||||
Bundle bundle = createMock(Bundle.class);
|
||||
expect(bundle.getEntry("/META-INF/services/org.jclouds.apis.ApiMetadata")).andReturn(getClass().getResource("/META-INF/services/org.jclouds.apis.ApiMetadata")).anyTimes();
|
||||
expect(bundle.loadClass("org.jclouds.apis.JcloudsTestBlobStoreApiMetadata")).andReturn(isolatedClassLoader.loadClass(JcloudsTestBlobStoreApiMetadata.class.getName())).anyTimes();
|
||||
expect(bundle.loadClass("org.jclouds.apis.JcloudsTestComputeApiMetadata")).andReturn(JcloudsTestComputeApiMetadata.class).anyTimes();
|
||||
expect(bundle.loadClass("org.jclouds.apis.JcloudsTestYetAnotherComputeApiMetadata")).andReturn(JcloudsTestYetAnotherComputeApiMetadata.class).anyTimes();
|
||||
|
||||
replay(bundle);
|
||||
List<ApiMetadata> apiMetadataList = listener.getApiMetadata(bundle);
|
||||
assertNotNull(apiMetadataList);
|
||||
assertEquals(2, apiMetadataList.size());
|
||||
assertFalse(apiMetadataList.contains(new JcloudsTestBlobStoreApiMetadata()));
|
||||
assertTrue(apiMetadataList.contains(new JcloudsTestComputeApiMetadata()));
|
||||
assertTrue(apiMetadataList.contains(new JcloudsTestYetAnotherComputeApiMetadata()));
|
||||
verify(bundle);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Creates a different {@link ClassLoader}.
|
||||
*
|
||||
* @return
|
||||
*/
|
||||
private ClassLoader createIsolatedClassLoader() throws MalformedURLException {
|
||||
URLClassLoader testClassLoader = (URLClassLoader) getClass().getClassLoader();
|
||||
URL[] urls = testClassLoader.getURLs();
|
||||
URLClassLoader loader = new URLClassLoader(urls, null);
|
||||
return loader;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue