294 lines
9.6 KiB
Java
294 lines
9.6 KiB
Java
package org.gcube.smartgears.provider;
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import static org.gcube.smartgears.Constants.configuration_file_path;
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import static org.gcube.smartgears.Constants.container_configuraton_file_path;
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import static org.gcube.smartgears.Constants.ghn_home_env;
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import static org.gcube.smartgears.Constants.ghn_home_property;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Set;
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import java.util.stream.Collectors;
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import javax.servlet.ServletContext;
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import org.gcube.common.events.Hub;
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import org.gcube.common.events.impl.DefaultHub;
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import org.gcube.common.security.credentials.Credentials;
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import org.gcube.smartgears.configuration.SmartgearsConfiguration;
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import org.gcube.smartgears.configuration.application.ApplicationConfiguration;
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import org.gcube.smartgears.configuration.application.ApplicationConfigurationBinder;
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import org.gcube.smartgears.configuration.application.ApplicationHandlers;
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import org.gcube.smartgears.configuration.container.ContainerConfiguration;
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import org.gcube.smartgears.configuration.container.ContainerConfigurationBinder;
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import org.gcube.smartgears.context.Properties;
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import org.gcube.smartgears.context.application.ApplicationContext;
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import org.gcube.smartgears.context.application.DefaultApplicationContext;
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import org.gcube.smartgears.context.container.ContainerContext;
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import org.gcube.smartgears.context.container.DefaultContainerContext;
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import org.gcube.smartgears.extensions.ApplicationExtension;
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import org.gcube.smartgears.extensions.resource.RemoteResource;
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import org.gcube.smartgears.handlers.container.ContainerHandler;
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import org.gcube.smartgears.lifecycle.application.ApplicationLifecycle;
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import org.gcube.smartgears.lifecycle.container.ContainerLifecycle;
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import org.gcube.smartgears.publishing.Publisher;
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import org.gcube.smartgears.publishing.SmartgearsProfilePublisher;
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import org.gcube.smartgears.security.AuthorizationProvider;
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import org.gcube.smartgears.security.AuthorizationProviderFactory;
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import org.gcube.smartgears.utils.Utils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import io.github.classgraph.ClassGraph;
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import io.github.classgraph.ClassInfo;
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import io.github.classgraph.ClassInfoList;
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import io.github.classgraph.ScanResult;
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/**
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* Default implementation of the {@link Provider} interface.
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*
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* @author Fabio Simeoni
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*
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*/
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public class DefaultProvider implements Provider {
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private static Logger log = LoggerFactory.getLogger(Provider.class);
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private ContainerContext containerContext;
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// TODO: do the same with applicationContext (with a map)
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private File configFile = null;
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protected DefaultProvider(File configFile) {
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this.configFile = configFile;
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}
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List<Publisher> publishers;
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protected DefaultProvider() {
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};
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@Override
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public ContainerContext containerContext() {
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if (containerContext == null) {
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ContainerConfiguration configuration = containerConfiguration();
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Hub hub = new DefaultHub();
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ContainerLifecycle lifecycle = new ContainerLifecycle(hub);
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AuthorizationProviderFactory<?> authfactory = configuration.authorizationConfiguration()
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.getAuthProviderFactory();
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Credentials credentials = configuration.authorizationConfiguration().getCredentials();
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AuthorizationProvider authProvider = authfactory.connect(credentials);
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containerContext = new DefaultContainerContext(configuration, hub, lifecycle, authProvider,
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new Properties());
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}
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return containerContext;
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}
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@Override
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public List<ContainerHandler> containerHandlers() {
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try {
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ContainerConfigurationBinder binder = new ContainerConfigurationBinder();
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ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
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if (currentClassLoader.getParent() != null
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&& !currentClassLoader.getParent().equals(ClassLoader.getSystemClassLoader())) {
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log.trace("probably i'm in a webapp classloader");
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currentClassLoader = currentClassLoader.getParent();
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}
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List<ContainerHandler> defaultHandlers = binder.bindHandlers(currentClassLoader);
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return defaultHandlers;
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot install container handlers (see cause) ", e);
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}
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}
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@Override
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public ApplicationContext contextFor(ContainerContext context, ServletContext application) {
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ApplicationConfiguration embedded = configurationFor(application);
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// shouldn't happen: management shouldn't have started at all
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if (embedded == null)
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throw new AssertionError("application @ " + application.getContextPath() + " is not distributed with "
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+ configuration_file_path + " and there is no external configuration for it in "
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+ container_configuraton_file_path);
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Hub hub = new DefaultHub();
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ApplicationLifecycle lifecycle = new ApplicationLifecycle(hub, embedded.name());
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return new DefaultApplicationContext(context, application, embedded, hub, lifecycle,
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new Properties());
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}
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@Override
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public ApplicationHandlers handlersFor(ApplicationContext context) {
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try {
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ApplicationConfigurationBinder binder = new ApplicationConfigurationBinder();
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// searching for smartegars related application handlers in the common
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// classloader
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ClassLoader currentClassLoader = Thread.currentThread().getContextClassLoader();
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if (currentClassLoader.getParent() != null
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&& !currentClassLoader.getParent().equals(ClassLoader.getSystemClassLoader())) {
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log.trace("probably i'm in a webapp classloader");
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currentClassLoader = currentClassLoader.getParent();
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}
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ApplicationHandlers defaultHandlers = binder.bindHandlers(currentClassLoader);
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return defaultHandlers;
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} catch (RuntimeException e) {
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throw new RuntimeException("cannot install handlers for application @ " + context.name() + " (see cause) ",
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e);
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}
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}
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public List<ApplicationExtension> extensionsFor(ApplicationContext context){
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return List.of(new RemoteResource());
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}
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// helpers
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private ApplicationConfiguration configurationFor(ServletContext application) {
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try {
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InputStream config = application.getResourceAsStream(configuration_file_path);
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if (config == null)
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return null;
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ApplicationConfigurationBinder binder = new ApplicationConfigurationBinder();
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return binder.load(config);
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} catch (RuntimeException e) {
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throw new RuntimeException("invalid configuration (see cause)", e);
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}
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}
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private ContainerConfiguration containerConfiguration() {
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if (configFile == null) {
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String home = Utils.home();
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if (home == null)
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throw new IllegalStateException("invalid node configuration: the environment variable " + ghn_home_env
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+ " or the system property " + ghn_home_property + " must be defined");
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File homeDir = new File(home);
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if (!(homeDir.exists() && homeDir.isDirectory() && homeDir.canRead() && homeDir.canWrite()))
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throw new IllegalStateException("invalid node configuration: home " + home
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+ " does not exist or is not a directory or cannot be accessed in read/write mode");
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configFile = new File(homeDir, container_configuraton_file_path);
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log.trace("reading container configuration @ {} ", configFile.getAbsolutePath());
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}
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if (!(configFile.exists() && configFile.canRead()))
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throw new IllegalStateException("invalid node configuration: file " + configFile.getAbsolutePath()
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+ " does not exist or cannot be accessed");
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ContainerConfiguration configuration;
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try (InputStream stream = new FileInputStream(configFile)) {
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configuration = new ContainerConfigurationBinder().load(stream);
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} catch (Exception e) {
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throw new IllegalStateException(
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"invalid node configuration: file " + configFile.getAbsolutePath() + " is invalid", e);
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}
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return configuration;
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}
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@Override
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public synchronized List<Publisher> publishers() {
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if (this.publishers == null) {
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Set<Class<?>> annotatedPublishers;
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try (ScanResult result = new ClassGraph().enableClassInfo().enableAnnotationInfo()
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.addClassLoader(Thread.currentThread().getContextClassLoader()).scan()) {
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ClassInfoList classInfos = result.getClassesWithAnnotation(SmartgearsProfilePublisher.class.getName());
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annotatedPublishers = classInfos.stream().map(ClassInfo::loadClass)
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.filter(c -> Publisher.class.isAssignableFrom(c)).collect(Collectors.toSet());
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}
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/*
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* Collection<URL> urls =
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* ClasspathHelper.forClassLoader(Thread.currentThread().getContextClassLoader()
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* ); urls.removeIf(url -> url.toString().endsWith(".so") ||
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* url.toString().endsWith(".zip") );
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*
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*
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* ConfigurationBuilder reflectionConf = new
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* ConfigurationBuilder().addUrls(urls).setScanners(new
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* TypeAnnotationsScanner(), new SubTypesScanner());
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*
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* Reflections reflection = new Reflections(reflectionConf);
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*
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* = reflection.getTypesAnnotatedWith(SmartgearsProfilePublisher.class);
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*/
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List<Publisher> foundPublishers = new ArrayList<Publisher>();
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for (Class<?> annotatedPublisher : annotatedPublishers) {
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try {
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foundPublishers.add((Publisher) annotatedPublisher.getDeclaredConstructor().newInstance());
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log.info("added class {} to publishers", annotatedPublisher);
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} catch (Throwable e) {
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log.error("publisher class {} cannot be instantiated", annotatedPublisher.getCanonicalName(), e);
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}
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}
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this.publishers = foundPublishers;
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if (foundPublishers.isEmpty())
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log.warn("no publishers found in classloader");
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}
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return this.publishers;
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}
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@Override
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public SmartgearsConfiguration smartgearsConfiguration() {
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ContainerConfigurationBinder binder = new ContainerConfigurationBinder();
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return binder.loadSmartgearsProperty();
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}
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/*
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* @Override public AuthorizationProvider authorizationProvider() { return
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* containerContext.authorizationProvider(); }
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*/
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}
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