private String doHotCodeReplace()

in com.microsoft.java.debug.plugin/src/main/java/com/microsoft/java/debug/plugin/internal/JavaHotCodeReplaceProvider.java [354:415]
51 lines of code
16 McCabe index (conditional complexity)

    private String doHotCodeReplace(List<IResource> resourcesToReplace, List<String> qualifiedNamesToReplace) {
        if (context == null || currentDebugSession == null) {
            return null;
        }

        if (resourcesToReplace == null || qualifiedNamesToReplace == null || qualifiedNamesToReplace.isEmpty()
                || resourcesToReplace.isEmpty()) {
            return null;
        }

        filterNotLoadedTypes(resourcesToReplace, qualifiedNamesToReplace);
        if (qualifiedNamesToReplace.isEmpty()) {
            return null;
            // If none of the changed types are loaded, do nothing.
        }

        // Not supported scenario:
        if (!currentDebugSession.getVM().canRedefineClasses()) {
            publishEvent(HotCodeReplaceEvent.EventType.ERROR, "JVM doesn't support hot reload classes");
            return "JVM doesn't support hot reload classes";
        }

        String errorMessage = null;
        publishEvent(HotCodeReplaceEvent.EventType.STARTING, "Start hot code replacement procedure...");

        try {
            List<ThreadReference> poppedThreads = new ArrayList<>();
            boolean framesPopped = false;
            if (this.currentDebugSession.getVM().canPopFrames()) {
                try {
                    attemptPopFrames(resourcesToReplace, qualifiedNamesToReplace, poppedThreads);
                    framesPopped = true; // No exception occurred
                } catch (DebugException e) {
                    logger.log(Level.WARNING, "Failed to pop frames " + e.getMessage(), e);
                }
            }

            redefineTypesJDK(resourcesToReplace, qualifiedNamesToReplace);
            for (Consumer<List<String>> consumer : consumers) {
                consumer.accept(qualifiedNamesToReplace);
            }

            if (containsObsoleteMethods()) {
                publishEvent(HotCodeReplaceEvent.EventType.ERROR, "JVM contains obsolete methods");
                errorMessage = "JVM contains obsolete methods";
            }

            if (currentDebugSession.getVM().canPopFrames() && framesPopped) {
                attemptStepIn(poppedThreads);
            } else {
                attemptDropToFrame(resourcesToReplace, qualifiedNamesToReplace);
            }
        } catch (DebugException e) {
            logger.log(Level.SEVERE, "Failed to complete hot code replace: " + e.getMessage(), e);
            errorMessage = e.getMessage();
        } finally {
            publishEvent(HotCodeReplaceEvent.EventType.END, "Completed hot code replace", qualifiedNamesToReplace);
            threadFrameMap.clear();
        }

        return errorMessage;
    }