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Diffstat (limited to 'sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner')
3 files changed, 240 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScanner.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScanner.java new file mode 100644 index 0000000000..2d03381c8a --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScanner.java @@ -0,0 +1,65 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.tuscany.sca.contribution.scanner; + +import java.net.URL; +import java.util.List; + +import org.apache.tuscany.sca.contribution.service.ContributionReadException; + +/** + * Interface for contribution package scanners + * + * Contribution scanners understand the format of the contribution and how to get the + * artifacts in the contribution. + * + * @version $Rev$ $Date$ + */ +public interface ContributionScanner { + + /** + * Returns the type of package supported by this package scanner. + * + * @return the package type + */ + String getContributionType(); + + /** + * Returns a list of artifacts in the contribution. + * + * @param contributionURL Contribution URL + * @return List of artifact URIs + * @throws ContributionException + * @throws IOException + */ + List<String> getArtifacts(URL contributionURL) throws ContributionReadException; + + /** + * Return the URL for an artifact in the contribution. + * + * This is needed for archives such as jar files that have specific URL schemes + * for the artifacts they contain. + * + * @param contributionURL Contribution URL + * @param artifact The relative URI for the artifact + * @return The artifact URL + */ + URL getArtifactURL(URL contributionURL, String artifact) throws ContributionReadException; + +} diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScannerExtensionPoint.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScannerExtensionPoint.java new file mode 100644 index 0000000000..1ca9def4ea --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/ContributionScannerExtensionPoint.java @@ -0,0 +1,50 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.tuscany.sca.contribution.scanner; + +/** + * An extension point for contribution scanners + * + * @version $Rev$ $Date$ + */ +public interface ContributionScannerExtensionPoint { + + /** + * Add a ContributionScanner using the contribution type as the key. + * + * @param scanner The contribution scanner + */ + void addContributionScanner(ContributionScanner scanner); + + /** + * Remove a ContributionScanner. + * + * @param scanner The contribution scanner + */ + void removeContributionScanner(ContributionScanner scanner); + + /** + * Returns the ContributionScanner for the given contribution type. + * + * @param contributionType The contribution type + * @return The contribution scanner + */ + ContributionScanner getContributionScanner(String contributionType); + +}
\ No newline at end of file diff --git a/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/DefaultContributionScannerExtensionPoint.java b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/DefaultContributionScannerExtensionPoint.java new file mode 100644 index 0000000000..cca1ae7a30 --- /dev/null +++ b/sca-java-1.x/branches/sca-java-1.6.2/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/scanner/DefaultContributionScannerExtensionPoint.java @@ -0,0 +1,125 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tuscany.sca.contribution.scanner; + +import java.io.IOException; +import java.lang.reflect.Constructor; +import java.net.URL; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Set; + +import org.apache.tuscany.sca.contribution.service.ContributionReadException; +import org.apache.tuscany.sca.extensibility.ServiceDeclaration; +import org.apache.tuscany.sca.extensibility.ServiceDiscovery; + +/** + * Default implementation of a contribution scanner extension point. + * + * @version $Rev$ $Date$ + */ +public class DefaultContributionScannerExtensionPoint implements ContributionScannerExtensionPoint { + + private Map<String, ContributionScanner> scanners = new HashMap<String, ContributionScanner>(); + private boolean loaded; + + public DefaultContributionScannerExtensionPoint() { + } + + public void addContributionScanner(ContributionScanner scanner) { + scanners.put(scanner.getContributionType(), scanner); + } + + public void removeContributionScanner(ContributionScanner scanner) { + scanners.remove(scanner.getContributionType()); + } + + public ContributionScanner getContributionScanner(String contentType) { + loadScanners(); + return scanners.get(contentType); + } + + private synchronized void loadScanners() { + if (loaded) + return; + + // Get the scanner service declarations + Set<ServiceDeclaration> scannerDeclarations; + try { + scannerDeclarations = ServiceDiscovery.getInstance().getServiceDeclarations(ContributionScanner.class); + } catch (IOException e) { + throw new IllegalStateException(e); + } + + for (ServiceDeclaration scannerDeclaration: scannerDeclarations) { + Map<String, String> attributes = scannerDeclaration.getAttributes(); + + // Load a URL artifact scanner + String contributionType = attributes.get("type"); + + // Create a scanner wrapper and register it + ContributionScanner scanner = new LazyContributionScanner(contributionType, scannerDeclaration); + addContributionScanner(scanner); + } + + loaded = true; + } + + /** + * A facade for contribution scanners. + */ + private static class LazyContributionScanner implements ContributionScanner { + + private ServiceDeclaration scannerDeclaration; + private String contributionType; + private ContributionScanner scanner; + + private LazyContributionScanner(String contributionType, ServiceDeclaration scannerDeclaration) { + this.scannerDeclaration = scannerDeclaration; + this.contributionType = contributionType; + } + + public URL getArtifactURL(URL contributionSourceURL, String artifact) throws ContributionReadException { + return getScanner().getArtifactURL(contributionSourceURL, artifact); + } + + public List<String> getArtifacts(URL contributionSourceURL) throws ContributionReadException { + return getScanner().getArtifacts(contributionSourceURL); + } + + public String getContributionType() { + return contributionType; + } + + private ContributionScanner getScanner() { + if (scanner == null) { + try { + Class<ContributionScanner> scannerClass = (Class<ContributionScanner>)scannerDeclaration.loadClass(); + Constructor<ContributionScanner> constructor = scannerClass.getConstructor(); + scanner = constructor.newInstance(); + } catch (Exception e) { + throw new IllegalStateException(e); + } + } + return scanner; + } + } +} |