Enhancements, fixes and refactoring of dependency tree processing API

domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeBuilder.java

@@ -0,0 +1,69 @@
+package io.quarkus.domino.inspect;
+
+import io.quarkus.bootstrap.resolver.maven.BootstrapMavenException;
+import io.quarkus.bootstrap.resolver.maven.MavenArtifactResolver;
+import java.util.List;
+import java.util.Objects;
+import org.eclipse.aether.artifact.Artifact;
+import org.eclipse.aether.artifact.DefaultArtifact;
+import org.eclipse.aether.collection.CollectRequest;
+import org.eclipse.aether.graph.Dependency;
+import org.eclipse.aether.graph.DependencyNode;
+import org.eclipse.aether.util.artifact.JavaScopes;
+
+public abstract class DependencyTreeBuilder {
+
+    private static final Artifact root = new DefaultArtifact("io.domino", "domino-tree-builder", "pom", "1");
+
+    public static DependencyTreeBuilder resolvingTreeBuilder(MavenArtifactResolver resolver) {
+        return new ResolvingDependencyTreeBuilder(resolver);
+    }
+
+    public static DependencyTreeBuilder nonResolvingTreeBuilder(MavenArtifactResolver resolver) {
+        return new NonResolvingDependencyTreeBuilder(resolver);
+    }
+
+    protected final MavenArtifactResolver resolver;
+
+    DependencyTreeBuilder(MavenArtifactResolver resolver) {
+        this.resolver = Objects.requireNonNull(resolver);
+    }
+
+    public DependencyNode buildTree(DependencyTreeRequest root) {
+        var rootNode = doBuildTree(root);
+        if (root.isDependency()) {
+            if (rootNode.getChildren().size() != 1) {
+                throw new RuntimeException("Expected a single child node but got " + rootNode.getChildren());
+            }
+            return rootNode.getChildren().get(0);
+        }
+        return rootNode;
+    }
+
+    public abstract DependencyNode doBuildTree(DependencyTreeRequest root);
+
+    protected CollectRequest createCollectRequest(DependencyTreeRequest root) {
+        var req = new CollectRequest().setManagedDependencies(root.getConstraints());
+        if (root.isPlugin()) {
+            try {
+                req.setRepositories(resolver.getMavenContext().getRemotePluginRepositories());
+            } catch (BootstrapMavenException e) {
+                throw new RuntimeException(e);
+            }
+        } else {
+            req.setRepositories(resolver.getRepositories());
+        }
+        var dep = new Dependency(
+                root.getArtifact(),
+                JavaScopes.RUNTIME,
+                false,
+                root.getExclusions());
+        if (root.isDependency()) {
+            req.setRootArtifact(DependencyTreeBuilder.root)
+                    .setDependencies(List.of(dep));
+        } else {
+            req.setRoot(dep);
+        }
+        return req;
+    }
+}

domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeError.java

@@ -0,0 +1,20 @@
+package io.quarkus.domino.inspect;
+
+public class DependencyTreeError {
+
+    private final DependencyTreeRequest request;
+    private final Throwable error;
+
+    public DependencyTreeError(DependencyTreeRequest request, Throwable error) {
+        this.request = request;
+        this.error = error;
+    }
+
+    public DependencyTreeRequest getRequest() {
+        return request;
+    }
+
+    public Throwable getError() {
+        return error;
+    }
+}

domino/api/src/main/java/io/quarkus/domino/tree/DependencyTreeProcessor.java → domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeInspector.java

@@ -1,4 +1,4 @@
-package io.quarkus.domino.tree;
+package io.quarkus.domino.inspect;
 
 import io.quarkus.bootstrap.resolver.maven.BootstrapMavenContext;
 import io.quarkus.bootstrap.resolver.maven.BootstrapMavenException;
@@ -14,10 +14,10 @@
 import org.eclipse.aether.graph.Dependency;
 import org.eclipse.aether.graph.Exclusion;
 
-public class DependencyTreeProcessor {
+public class DependencyTreeInspector {
 
-    public static DependencyTreeProcessor configure() {
-        return new DependencyTreeProcessor();
+    public static DependencyTreeInspector configure() {
+        return new DependencyTreeInspector();
     }
 
     private String settings;
@@ -29,55 +29,73 @@ public static DependencyTreeProcessor configure() {
     private DependencyTreeVisitor<?> treeVisitor;
     private boolean parallelProcessing;
     private MessageWriter log;
-    private List<DependencyTreeRoot> roots = new ArrayList<>();
+    private List<DependencyTreeRequest> roots = new ArrayList<>();
 
-    private DependencyTreeProcessor() {
+    private DependencyTreeInspector() {
     }
 
-    public DependencyTreeProcessor setTreeBuilder(DependencyTreeBuilder treeBuilder) {
+    public DependencyTreeInspector setTreeBuilder(DependencyTreeBuilder treeBuilder) {
         this.treeBuilder = treeBuilder;
         return this;
     }
 
-    public DependencyTreeProcessor setArtifactResolver(MavenArtifactResolver resolver) {
+    public DependencyTreeInspector setArtifactResolver(MavenArtifactResolver resolver) {
         this.resolver = resolver;
         return this;
     }
 
-    public DependencyTreeProcessor setResolveDependencies(boolean resolveDependencies) {
+    public DependencyTreeInspector setResolveDependencies(boolean resolveDependencies) {
         this.resolveDependencies = resolveDependencies;
         return this;
     }
 
-    public DependencyTreeProcessor setTreeVisitor(DependencyTreeVisitor<?> treeVisitor) {
+    public DependencyTreeInspector setTreeVisitor(DependencyTreeVisitor<?> treeVisitor) {
         this.treeVisitor = treeVisitor;
         return this;
     }
 
-    public DependencyTreeProcessor setParallelProcessing(boolean parallelProcessing) {
+    public DependencyTreeInspector setParallelProcessing(boolean parallelProcessing) {
         this.parallelProcessing = parallelProcessing;
         return this;
     }
 
-    public DependencyTreeProcessor setMessageWriter(MessageWriter log) {
+    public DependencyTreeInspector setMessageWriter(MessageWriter log) {
         this.log = log;
         return this;
     }
 
-    public DependencyTreeProcessor addRoot(Artifact artifact) {
-        return addRoot(artifact, List.of(), List.of());
+    public DependencyTreeInspector inspectAsDependency(Artifact artifact) {
+        return inspectAsDependency(artifact, List.of(), List.of());
     }
 
-    public DependencyTreeProcessor addRoot(Artifact artifact, List<Dependency> constraints) {
-        return addRoot(artifact, constraints, List.of());
+    public DependencyTreeInspector inspectAsDependency(Artifact artifact, List<Dependency> constraints) {
+        return inspectAsDependency(artifact, constraints, List.of());
     }
 
-    public DependencyTreeProcessor addRoot(Artifact artifact, List<Dependency> constraints, Collection<Exclusion> exclusions) {
-        this.roots.add(new DependencyTreeRoot(artifact, constraints, exclusions));
+    public DependencyTreeInspector inspectAsDependency(Artifact artifact, List<Dependency> constraints,
+            Collection<Exclusion> exclusions) {
+        return inspect(DependencyTreeRequest.ofDependency(artifact, constraints, exclusions));
+    }
+
+    public DependencyTreeInspector inspectAsRoot(Artifact artifact, List<Dependency> constraints,
+            Collection<Exclusion> exclusions) {
+        return inspect(DependencyTreeRequest.ofRoot(artifact, constraints, exclusions));
+    }
+
+    public DependencyTreeInspector inspectPlugin(Artifact artifact) {
+        return inspect(DependencyTreeRequest.ofPlugin(artifact));
+    }
+
+    public DependencyTreeInspector inspectPlugin(Artifact artifact, Collection<Exclusion> exclusions) {
+        return inspect(DependencyTreeRequest.ofPlugin(artifact, exclusions));
+    }
+
+    public DependencyTreeInspector inspect(DependencyTreeRequest request) {
+        this.roots.add(request);
         return this;
     }
 
-    public void process() {
+    public void complete() {
 
         if (resolver == null) {
             var config = BootstrapMavenContext.config()
@@ -114,27 +132,27 @@ public void process() {
         }
 
         if (treeVisitor == null) {
-            treeVisitor = new DependencyTreeVisitor<Object>() {
+            treeVisitor = new DependencyTreeVisitor<>() {
                 @Override
-                public void visitTree(DependencyTreeVisit<Object> ctx) {
+                public void visit(DependencyTreeVisit<Object> ctx) {
                 }
 
                 @Override
                 public void onEvent(Object event, MessageWriter log) {
                 }
 
                 @Override
-                public void handleResolutionFailures(Collection<Artifact> artifacts) {
+                public void handleResolutionFailures(Collection<DependencyTreeError> requests) {
                 }
             };
         }
 
         var scheduler = parallelProcessing
                 ? DependencyTreeVisitScheduler.parallel(treeBuilder, treeVisitor, log, roots.size())
-                : DependencyTreeVisitScheduler.sequencial(treeBuilder, treeVisitor, log, roots.size());
+                : DependencyTreeVisitScheduler.sequential(treeBuilder, treeVisitor, log, roots.size());
 
         for (var r : roots) {
-            scheduler.scheduleProcessing(r);
+            scheduler.process(r);
         }
         scheduler.waitForCompletion();
         if (!scheduler.getResolutionFailures().isEmpty()) {

domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeRequest.java

@@ -0,0 +1,74 @@
+package io.quarkus.domino.inspect;
+
+import java.util.Collection;
+import java.util.List;
+import org.eclipse.aether.artifact.Artifact;
+import org.eclipse.aether.graph.Dependency;
+import org.eclipse.aether.graph.Exclusion;
+
+public class DependencyTreeRequest {
+
+    /* @formatter:off */
+    private static final byte ROOT       = 0b001;
+    private static final byte DEPENDENCY = 0b010;
+    private static final byte PLUGIN     = 0b100;
+    /* @formatter:on */
+
+    public static DependencyTreeRequest ofRoot(Artifact artifact, List<Dependency> constraints,
+            Collection<Exclusion> exclusions) {
+        return new DependencyTreeRequest(artifact, constraints, exclusions, ROOT);
+    }
+
+    public static DependencyTreeRequest ofDependency(Artifact artifact, List<Dependency> constraints,
+            Collection<Exclusion> exclusions) {
+        return new DependencyTreeRequest(artifact, constraints, exclusions, DEPENDENCY);
+    }
+
+    public static DependencyTreeRequest ofPlugin(Artifact artifact) {
+        return ofPlugin(artifact, List.of());
+    }
+
+    public static DependencyTreeRequest ofPlugin(Artifact artifact, Collection<Exclusion> exclusions) {
+        return new DependencyTreeRequest(artifact, List.of(), exclusions, PLUGIN);
+    }
+
+    private final Artifact root;
+    private final List<Dependency> constraints;
+    private final Collection<Exclusion> exclusions;
+    private final byte type;
+
+    private DependencyTreeRequest(Artifact root, List<Dependency> constraints, Collection<Exclusion> exclusions, byte type) {
+        this.root = root;
+        this.constraints = constraints;
+        this.exclusions = exclusions;
+        this.type = type;
+    }
+
+    String getId() {
+        return root.toString();
+    }
+
+    public Artifact getArtifact() {
+        return root;
+    }
+
+    public List<Dependency> getConstraints() {
+        return constraints;
+    }
+
+    public Collection<Exclusion> getExclusions() {
+        return exclusions;
+    }
+
+    boolean isRoot() {
+        return type == ROOT;
+    }
+
+    boolean isDependency() {
+        return type == DEPENDENCY;
+    }
+
+    boolean isPlugin() {
+        return type == PLUGIN;
+    }
+}

domino/api/src/main/java/io/quarkus/domino/tree/DefaultTreeProcessingContext.java → domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeVisitContext.java

@@ -1,17 +1,17 @@
-package io.quarkus.domino.tree;
+package io.quarkus.domino.inspect;
 
 import io.quarkus.devtools.messagewriter.MessageWriter;
 import java.util.Objects;
 import org.eclipse.aether.graph.DependencyNode;
 
-class DefaultTreeProcessingContext<E> implements DependencyTreeVisitor.DependencyTreeVisit<E> {
+class DependencyTreeVisitContext<E> implements DependencyTreeVisitor.DependencyTreeVisit<E> {
 
-    private final DependencyTreeVisitor<E> processor;
+    private final DependencyTreeVisitor<E> visitor;
     private final MessageWriter log;
     DependencyNode root;
 
-    DefaultTreeProcessingContext(DependencyTreeVisitor<E> processor, MessageWriter log) {
-        this.processor = processor;
+    DependencyTreeVisitContext(DependencyTreeVisitor<E> visitor, MessageWriter log) {
+        this.visitor = visitor;
         this.log = log;
     }
 
@@ -28,6 +28,6 @@ public MessageWriter getLog() {
     @Override
     public void pushEvent(E event) {
         Objects.requireNonNull(root, "Dependency tree root node is null");
-        processor.onEvent(event, log);
+        visitor.onEvent(event, log);
     }
 }

domino/api/src/main/java/io/quarkus/domino/inspect/DependencyTreeVisitScheduler.java

@@ -0,0 +1,28 @@
+package io.quarkus.domino.inspect;
+
+import io.quarkus.devtools.messagewriter.MessageWriter;
+import java.util.Collection;
+
+public interface DependencyTreeVisitScheduler {
+
+    static <E> DependencyTreeVisitScheduler sequential(DependencyTreeBuilder treeBuilder,
+            DependencyTreeVisitor<E> visitor,
+            MessageWriter log,
+            int treesTotal) {
+        return new SequentialTreeVisitScheduler<>(visitor, log, treesTotal, treeBuilder);
+    }
+
+    static <E> DependencyTreeVisitScheduler parallel(DependencyTreeBuilder treeBuilder,
+            DependencyTreeVisitor<E> visitor,
+            MessageWriter log,
+            int treesTotal) {
+        return new ParallelTreeVisitScheduler<>(visitor, log, treesTotal, treeBuilder);
+    }
+
+    void process(DependencyTreeRequest root);
+
+    void waitForCompletion();
+
+    Collection<DependencyTreeError> getResolutionFailures();
+
+}