public <V> V execute(MavenProject project, ICallable<V> callable, IProgressMonitor monitor)
throws CoreException {
Deque<MavenExecutionContext> stack = threadLocal.get();
if (stack == null) {
stack = new ArrayDeque<MavenExecutionContext>();
threadLocal.set(stack);
}
final MavenExecutionContext parent = stack.peek();
if (this == parent) {
// shortcut the setup logic, this is nested invocation of the same context
return executeBare(project, callable, monitor);
}
// remember original configuration to "pop" the session stack properly
final MavenExecutionRequest origRequest = request;
final Map<String, Object> origContext = context;
if (request == null && parent != null) {
this.request = parent.request;
this.context = new HashMap<String, Object>(parent.context);
} else {
this.context = new HashMap<String, Object>();
if (request == null) {
request = newExecutionRequest();
}
maven.populateDefaults(request);
populateSystemProperties(request);
setValue(CTX_LOCALREPOSITORY, request.getLocalRepository());
final FilterRepositorySystemSession repositorySession =
maven.createRepositorySession(request);
setValue(CTX_REPOSITORYSESSION, repositorySession);
if (parent != null) {
repositorySession.setData(parent.getRepositorySession().getData());
}
final MavenExecutionResult result = new DefaultMavenExecutionResult();
setValue(
CTX_MAVENSESSION,
new MavenSession(maven.getPlexusContainer(), repositorySession, request, result));
}
final LegacySupport legacySupport = maven.lookup(LegacySupport.class);
final MavenSession origLegacySession =
legacySupport.getSession(); // TODO validate == origSession
stack.push(this);
legacySupport.setSession(getSession());
try {
return executeBare(project, callable, monitor);
} finally {
stack.pop();
if (stack.isEmpty()) {
threadLocal.set(null); // TODO decide if this is useful
}
legacySupport.setSession(origLegacySession);
request = origRequest;
context = origContext;
}
}
private <V> V executeBare(MavenProject project, ICallable<V> callable, IProgressMonitor monitor)
throws CoreException {
final MavenSession mavenSession = getSession();
final FilterRepositorySystemSession repositorySession = getRepositorySession();
final TransferListener origTransferListener =
repositorySession.setTransferListener(maven.createArtifactTransferListener(monitor));
final MavenProject origProject = mavenSession.getCurrentProject();
final List<MavenProject> origProjects = mavenSession.getProjects();
try {
if (project != null) {
mavenSession.setCurrentProject(project);
mavenSession.setProjects(Collections.singletonList(project));
}
return callable.call(this, monitor);
} finally {
repositorySession.setTransferListener(origTransferListener);
if (project != null) {
mavenSession.setCurrentProject(origProject);
mavenSession.setProjects(
origProjects != null ? origProjects : Collections.<MavenProject>emptyList());
}
}
}
