1 files changed, 194 insertions, 0 deletions
diff --git a/openecomp-be/tools/snapshot-signature-plugin/src/main/java/org/openecomp/sdc/onboarding/SnapshotSignature.java b/openecomp-be/tools/snapshot-signature-plugin/src/main/java/org/openecomp/sdc/onboarding/SnapshotSignature.java
new file mode 100644
index 0000000000..f4a03ed47a
--- /dev/null
+++ b/openecomp-be/tools/snapshot-signature-plugin/src/main/java/org/openecomp/sdc/onboarding/SnapshotSignature.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright © 2018 European Support Limited
+ *
+ * Licensed 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 a "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.openecomp.sdc.onboarding;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ForkJoinPool;
+import java.util.concurrent.RecursiveTask;
+import java.util.stream.Collectors;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.MojoFailureException;
+import org.apache.maven.plugins.annotations.LifecyclePhase;
+import org.apache.maven.plugins.annotations.Mojo;
+import org.apache.maven.plugins.annotations.Parameter;
+import org.apache.maven.plugins.annotations.ResolutionScope;
+import org.apache.maven.project.MavenProject;
+
+@Mojo(name = "generate-signature", threadSafe = true, defaultPhase = LifecyclePhase.COMPILE,
+        requiresDependencyResolution = ResolutionScope.NONE)
+public class SnapshotSignature extends AbstractMojo {
+
+    public static final String JAVA_EXT = ".java";
+    public static final String UNICORN = "unicorn";
+    public static final String CHECKSUM = "checksum";
+    public static final String DOT = ".";
+    public static final String SHA1 = "sha1";
+    public static final String COLON = ":";
+    public static final String ANY_EXT = "*";
+    public static final String SNAPSHOT = "SNAPSHOT";
+    public static final String JAR = "jar";
+
+    @Parameter
+    private File mainSourceLocation;
+    @Parameter
+    private File mainResourceLocation;
+    @Parameter(defaultValue = "${project}")
+    private MavenProject project;
+
+    @Override
+    public void execute() throws MojoExecutionException, MojoFailureException {
+        if (!JAR.equals(project.getPackaging())) {
+            return;
+        }
+        init();
+        long resourceChecksum = getChecksum(mainResourceLocation, ANY_EXT);
+        long mainChecksum = getChecksum(mainSourceLocation, JAVA_EXT);
+        byte[] sourceChecksum = calculateChecksum(mainChecksum, resourceChecksum).getBytes();
+        generateSignature(sourceChecksum);
+    }
+
+    private void init() {
+        if (mainSourceLocation == null) {
+            mainSourceLocation = Paths.get(project.getBuild().getSourceDirectory()).toFile();
+        }
+        if (mainResourceLocation == null) {
+            mainResourceLocation = Paths.get(project.getBuild().getResources().get(0).getDirectory()).toFile();
+        }
+    }
+
+    private long getChecksum(File file, String fileType) {
+        try {
+            return readSources(file, fileType).hashCode();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private Map<String, List<String>> readSources(File file, String fileType) throws IOException {
+        Map<String, List<String>> source = new HashMap<>();
+        if (file.exists()) {
+            List<File> list = Files.walk(Paths.get(file.getAbsolutePath()))
+                                   .filter(JAVA_EXT.equals(fileType) ? this::isRegularJavaFile : Files::isRegularFile)
+                                   .map(Path::toFile).collect(Collectors.toList());
+            source.putAll(ForkJoinPool.commonPool()
+                                      .invoke(new FileReadTask(list.toArray(new File[0]), file.getAbsolutePath())));
+        }
+        return source;
+    }
+
+    private boolean isRegularJavaFile(Path path) {
+        File file = path.toFile();
+        return file.isFile() && file.getName().endsWith(JAVA_EXT);
+    }
+
+    private class FileReadTask extends RecursiveTask<Map<String, List<String>>> {
+
+        private Map<String, List<String>> store = new HashMap<>();
+        File[] files;
+        String pathPrefix;
+        private static final int MAX_FILES = 10;
+
+        FileReadTask(File[] files, String pathPrefix) {
+            this.files = files;
+            this.pathPrefix = pathPrefix;
+        }
+
+        private List<String> getData(File file) throws IOException {
+            List<String> coll = Files.readAllLines(file.toPath(), StandardCharsets.ISO_8859_1);
+            if (file.getAbsolutePath().contains(File.separator + "generated-sources" + File.separator)) {
+                Iterator<String> itr = coll.iterator();
+                while (itr.hasNext()) {
+                    String s = itr.next();
+                    if (s == null || s.trim().startsWith("/") || s.trim().startsWith("*")) {
+                        itr.remove();
+                    }
+                }
+            }
+            return coll;
+        }
+
+
+        @Override
+        protected Map<String, List<String>> compute() {
+            if (files.length > MAX_FILES) {
+                FileReadTask task1 = new FileReadTask(Arrays.copyOfRange(files, 0, files.length / 2), pathPrefix);
+                FileReadTask task2 =
+                        new FileReadTask(Arrays.copyOfRange(files, files.length / 2, files.length), pathPrefix);
+                task1.fork();
+                task2.fork();
+                store.putAll(task1.join());
+                store.putAll(task2.join());
+            } else {
+                for (File toRead : files) {
+                    try {
+                        store.put(toRead.getAbsolutePath().substring(pathPrefix.length())
+                                        .replace(File.separatorChar, '.'), getData(toRead));
+                    } catch (IOException e) {
+                        throw new UncheckedIOException(e);
+                    }
+                }
+            }
+
+            return store;
+        }
+    }
+
+    private void generateSignature(byte[] sourceChecksum) {
+        try {
+            Paths.get(project.getBuild().getOutputDirectory()).toFile().mkdirs();
+            Files.write(Paths.get(project.getBuild().getOutputDirectory(), UNICORN + DOT + CHECKSUM), sourceChecksum,
+                    StandardOpenOption.CREATE);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
+    private String calculateChecksum(long mainChecksum, long resourceChecksum) throws MojoExecutionException {
+        try {
+            return getSourceChecksum(mainChecksum + COLON + resourceChecksum, SHA1);
+        } catch (NoSuchAlgorithmException e) {
+            throw new MojoExecutionException(e.getMessage(), e);
+        }
+    }
+
+    private String getSourceChecksum(String data, String hashType) throws NoSuchAlgorithmException {
+        MessageDigest md = MessageDigest.getInstance(hashType);
+        md.update(data.getBytes());
+        byte[] hashBytes = md.digest();
+
+        StringBuilder buffer = new StringBuilder();
+        for (byte hashByte : hashBytes) {
+            buffer.append(Integer.toString((hashByte & 0xff) + 0x100, 16).substring(1));
+        }
+        return buffer.toString();
+    }
+}