* under the License.
 */
package org.apache.maven.logging;

import org.apache.maven.slf4j.MavenSimpleLogger;
import org.slf4j.MDC;

/**
 * Forwards log messages to the client.
 */
public class ProjectBuildLogAppender implements AutoCloseable {

    private static final String KEY_PROJECT_ID = "maven.project.id";
    private static final ThreadLocal<String> PROJECT_ID = new InheritableThreadLocal<>();

        dispatcher.transfer(ProjectBuildLogAppender.getProjectId(), event);
        delegate.transferInitiated(event);
    }

    @Override
    public void transferStarted(TransferEvent event) throws TransferCancelledException {
        dispatcher.transfer(ProjectBuildLogAppender.getProjectId(), event);
        delegate.transferStarted(event);
    }

    @Override

        setMdc(event);
        delegate.forkStarted(event);
        ProjectBuildLogAppender.setForkingProjectId(event.getProject().getArtifactId());
    }

    @Override
    public void forkSucceeded(ExecutionEvent event) {
        delegate.forkSucceeded(event);
        ProjectBuildLogAppender.setForkingProjectId(null);
    }

    @Override
    public void forkFailed(ExecutionEvent event) {

            ProjectBuildLogAppender.updateMdc();
            consumer.accept(line);
            buf.reset();
        }
    }

    public void forceFlush() {
        if (buf.size() > 0) {
            String line = new String(buf.toByteArray(), 0, buf.size());
            ProjectBuildLogAppender.updateMdc();
            consumer.accept(line);
            buf.reset();

    }

    @Override
    public String getName() {
        return logger.getName();
    }

    private void setMdc() {
        if (projectId != null && ProjectBuildLogAppender.getProjectId() == null) {
            ProjectBuildLogAppender.setProjectId(projectId);
        }
    }

        if (context.terminal == null) {
            // Create the build log appender; also sets MavenSimpleLogger sink
            ProjectBuildLogAppender projectBuildLogAppender =
                    new ProjectBuildLogAppender(determineBuildEventListener(context));
            context.closeables.add(projectBuildLogAppender);

            MessageUtils.systemInstall(
                    builder -> doCreateTerminal(context, builder),