First steps to create a bootstrap module for data migration

scm-webapp/src/main/java/sonia/scm/BootstrapModule.java

@@ -0,0 +1,102 @@
+package sonia.scm;
+
+import com.google.inject.AbstractModule;
+import com.google.inject.throwingproviders.ThrowingProviderBinder;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import sonia.scm.config.ScmConfiguration;
+import sonia.scm.io.DefaultFileSystem;
+import sonia.scm.io.FileSystem;
+import sonia.scm.plugin.DefaultPluginLoader;
+import sonia.scm.repository.RepositoryDAO;
+import sonia.scm.repository.xml.XmlRepositoryDAO;
+import sonia.scm.security.CipherUtil;
+import sonia.scm.security.DefaultKeyGenerator;
+import sonia.scm.security.KeyGenerator;
+import sonia.scm.store.BlobStoreFactory;
+import sonia.scm.store.ConfigurationEntryStoreFactory;
+import sonia.scm.store.ConfigurationStoreFactory;
+import sonia.scm.store.DataStoreFactory;
+import sonia.scm.store.FileBlobStoreFactory;
+import sonia.scm.store.JAXBConfigurationEntryStoreFactory;
+import sonia.scm.store.JAXBConfigurationStoreFactory;
+import sonia.scm.store.JAXBDataStoreFactory;
+import sonia.scm.util.ScmConfigurationUtil;
+
+public class BootstrapModule extends AbstractModule {
+
+  private static final Logger LOG = LoggerFactory.getLogger(BootstrapModule.class);
+
+  private final ClassOverrides overrides;
+  private final DefaultPluginLoader pluginLoader;
+
+  public BootstrapModule(ClassOverrides overrides, DefaultPluginLoader pluginLoader) {
+    this.overrides = overrides;
+    this.pluginLoader = pluginLoader;
+  }
+
+  @Override
+  protected void configure() {
+    install(ThrowingProviderBinder.forModule(this));
+
+    ScmConfiguration config = getScmConfiguration();
+
+    CipherUtil cu = CipherUtil.getInstance();
+
+    SCMContextProvider context = SCMContext.getContext();
+
+    bind(SCMContextProvider.class).toInstance(context);
+
+    bind(KeyGenerator.class).to(DefaultKeyGenerator.class);
+
+    bind(RepositoryDAO.class, XmlRepositoryDAO.class);
+
+    bind(FileSystem.class, DefaultFileSystem.class);
+
+
+    // bind core
+    bind(ConfigurationStoreFactory.class, JAXBConfigurationStoreFactory.class);
+    bind(ConfigurationEntryStoreFactory.class, JAXBConfigurationEntryStoreFactory.class);
+    bind(DataStoreFactory.class, JAXBDataStoreFactory.class);
+    bind(BlobStoreFactory.class, FileBlobStoreFactory.class);
+
+    //    bind(ScmConfiguration.class).toInstance(config);
+//    bind(PluginLoader.class).toInstance(pluginLoader);
+//    bind(PluginManager.class, DefaultPluginManager.class);
+
+    // note CipherUtil uses an other generator
+//    bind(KeyGenerator.class).to(DefaultKeyGenerator.class);
+//    bind(CipherHandler.class).toInstance(cu.getCipherHandler());
+//    bind(FileSystem.class, DefaultFileSystem.class);
+  }
+
+  private <T> void bind(Class<T> clazz, Class<? extends T> defaultImplementation) {
+    Class<? extends T> implementation = find(clazz, defaultImplementation);
+    LOG.debug("bind {} to {}", clazz, implementation);
+    bind(clazz).to(implementation);
+  }
+
+  private <T> Class<? extends T> find(Class<T> clazz, Class<? extends T> defaultImplementation) {
+    Class<? extends T> implementation = overrides.getOverride(clazz);
+
+    if (implementation != null) {
+      LOG.info("found override {} for {}", implementation, clazz);
+    } else {
+      implementation = defaultImplementation;
+
+      LOG.trace(
+        "no override available for {}, using default implementation {}",
+        clazz, implementation);
+    }
+
+    return implementation;
+  }
+
+  private ScmConfiguration getScmConfiguration() {
+    ScmConfiguration configuration = new ScmConfiguration();
+
+    ScmConfigurationUtil.getInstance().load(configuration);
+
+    return configuration;
+  }
+}