JAR files are not refreshed after they are updated

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/ResourceUtils.java

@@ -254,10 +254,13 @@ public static String toGlobPattern(IPath path) {
 			// file detection, at least on vscode
 			globPattern = globPattern.replace(path.getDevice(), "**");
 		}
-		if (!globPattern.endsWith("/")) {
-			globPattern += "/";
+		if (!globPattern.endsWith(".jar") && !globPattern.endsWith(".zip")) {
+			if (!globPattern.endsWith("/")) {
+				globPattern += "/";
+			}
+			globPattern += "**";
 		}
-		return globPattern + "**";
+		return globPattern;
 	}
 
 }

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/managers/EclipseBuildSupport.java

@@ -12,9 +12,18 @@
 
 import java.util.Set;
 
+import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IResource;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.jdt.core.IClasspathEntry;
+import org.eclipse.jdt.core.IJavaProject;
+import org.eclipse.jdt.core.JavaCore;
+import org.eclipse.jdt.ls.core.internal.ProjectUtils;
+import org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.CHANGE_TYPE;
 
 import com.google.common.collect.Sets;
 
@@ -49,4 +58,31 @@ public boolean isBuildFile(IResource resource) {
 		return false;
 	}
 
+	@Override
+	public boolean fileChanged(IResource resource, CHANGE_TYPE changeType, IProgressMonitor monitor) throws CoreException {
+		if (resource == null || !applies(resource.getProject())) {
+			return false;
+		}
+		refresh(resource, changeType, monitor);
+		IProject project = resource.getProject();
+		if (ProjectUtils.isJavaProject(project)) {
+			IJavaProject javaProject = JavaCore.create(project);
+			IClasspathEntry[] classpath = javaProject.getRawClasspath();
+			for (IClasspathEntry entry : classpath) {
+				if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) {
+					IPath path = entry.getPath();
+					IFile r = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
+					if (r != null && r.equals(resource)) {
+						IClasspathEntry[] rawClasspath = javaProject.getRawClasspath();
+						javaProject.setRawClasspath(new IClasspathEntry[0], monitor);
+						javaProject.setRawClasspath(rawClasspath, monitor);
+						break;
+					}
+				}
+			}
+		}
+		return false;
+	}
+
+
 }

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/managers/InvisibleProjectBuildSupport.java

@@ -27,14 +27,7 @@ public class InvisibleProjectBuildSupport extends EclipseBuildSupport implements
 
 	static final String LIB_FOLDER = "lib";
 
-	private UpdateClasspathJob updateClasspathJob;
-
 	public InvisibleProjectBuildSupport() {
-		this(UpdateClasspathJob.getInstance());
-	}
-
-	public InvisibleProjectBuildSupport(UpdateClasspathJob updateClasspathJob) {
-		this.updateClasspathJob = updateClasspathJob;
 	}
 
 	@Override
@@ -53,7 +46,7 @@ public boolean fileChanged(IResource resource, CHANGE_TYPE changeType, IProgress
 		if (realFolderPath != null) {
 			IPath libFolderPath = realFolderPath.append(LIB_FOLDER);
 			if (libFolderPath.isPrefixOf(resource.getLocation())) {
-				updateClasspathJob.updateClasspath(JavaCore.create(invisibleProject), libFolderPath);
+				UpdateClasspathJob.getInstance().updateClasspath(JavaCore.create(invisibleProject), libFolderPath);
 			}
 		}
 		return false;

org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/managers/ProjectsManager.java

@@ -36,6 +36,7 @@
 import java.util.stream.Stream;
 
 import org.codehaus.plexus.util.StringUtils;
+import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IFolder;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.IProjectDescription;
@@ -589,6 +590,16 @@ public List<FileSystemWatcher> registerWatchers() {
 
 								}
 							}
+							if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY) {
+								IPath path = entry.getPath();
+								IFile resource = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
+								if (resource != null && !resource.isDerived()) {
+									IPath location = resource.getLocation();
+									if (location != null && !isContainedIn(location, sources)) {
+										sources.add(location);
+									}
+								}
+							}
 						}
 						if (!ProjectUtils.isVisibleProject(project)) {
 							//watch lib folder for invisible projects

org.eclipse.jdt.ls.tests/projects/eclipse/updatejar/.classpath

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="lib" path="lib/foo.jar"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

org.eclipse.jdt.ls.tests/projects/eclipse/updatejar/.project

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>updatejar</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

org.eclipse.jdt.ls.tests/projects/eclipse/updatejar/src/Test.java

@@ -0,0 +1,10 @@
+import foo.bar;
+
+public class Test {
+
+	public static void main(String[] args) {
+		int sum = bar.add(1, 2, 3);
+		System.out.println(sum);
+	}
+
+}

org.eclipse.jdt.ls.tests/src/org/eclipse/jdt/ls/core/internal/ResourceUtilsTest.java

@@ -26,5 +26,6 @@ public void testToGlobPattern() {
 		assertEquals("/foo/bar/**", toGlobPattern(Path.forPosix("/foo/bar/")));
 		assertEquals("**/foo/bar/**", toGlobPattern(Path.forWindows("c:/foo/bar/")));
 		assertEquals("**/foo/bar/**", toGlobPattern(Path.forWindows("c:\\foo\\bar")));
+		assertEquals("/foo/bar/foo.jar", toGlobPattern(Path.forPosix("/foo/bar/foo.jar")));
 	}
 }

org.eclipse.jdt.ls.tests/src/org/eclipse/jdt/ls/core/internal/managers/EclipseBuildSupportTest.java

@@ -0,0 +1,55 @@
+/*******************************************************************************
+ * Copyright (c) 2019 Red Hat Inc. and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     Red Hat Inc. - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.jdt.ls.core.internal.managers;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.File;
+import java.util.List;
+
+import org.apache.commons.io.FileUtils;
+import org.eclipse.core.resources.IMarker;
+import org.eclipse.core.resources.IProject;
+import org.eclipse.core.resources.ResourcesPlugin;
+import org.eclipse.jdt.ls.core.internal.ResourceUtils;
+import org.eclipse.jdt.ls.core.internal.managers.ProjectsManager.CHANGE_TYPE;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.runners.MockitoJUnitRunner;
+
+/**
+ * @author snjeza
+ *
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class EclipseBuildSupportTest extends AbstractProjectsManagerBasedTest {
+
+	@Test
+	public void testUpdateJar() throws Exception {
+		importProjects("eclipse/updatejar");
+		IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject("updatejar");
+		assertIsJavaProject(project);
+		List<IMarker> errors = ResourceUtils.getErrorMarkers(project);
+		assertEquals("Unexpected errors " + ResourceUtils.toString(errors), 2, errors.size());
+		File projectFile = project.getLocation().toFile();
+		File validFooJar = new File(projectFile, "foo.jar");
+		File destLib = new File(projectFile, "lib");
+		FileUtils.copyFileToDirectory(validFooJar, destLib);
+		File newJar = new File(destLib, "foo.jar");
+		projectsManager.fileChanged(newJar.toPath().toUri().toString(), CHANGE_TYPE.CREATED);
+		waitForBackgroundJobs();
+		errors = ResourceUtils.getErrorMarkers(project);
+		assertEquals("Unexpected errors " + ResourceUtils.toString(errors), 0, errors.size());
+
+	}
+
+
+}