* optionally process each line with a callback function, and maintain a circular buffer
 * of recent lines for retrieval.
 */
public class InputStreamThread extends Thread {
    /** Logger instance for this class */
    private static final Logger logger = LogManager.getLogger(InputStreamThread.class);

    /** Buffered reader for reading from the input stream */
    private final BufferedReader br;

        Process mockProcess = createMockProcess("test data");
        JobProcess jobProcess = new JobProcess(mockProcess);

        InputStreamThread thread = jobProcess.getInputStreamThread();

        assertNotNull(thread);
        assertEquals("InputStreamThread", thread.getName());
    }

    public void test_constructor_withZeroBufferSize() throws IOException {
        Process mockProcess = createMockProcess("test");

        InputStreamThread thread = new InputStreamThread(is, StandardCharsets.UTF_8, InputStreamThread.MAX_BUFFER_SIZE, null);
        thread.start();
        thread.join(2000);

        String output = thread.getOutput();
        String[] lines = output.split("\n");

        assertTrue("Buffer should respect max size", lines.length <= InputStreamThread.MAX_BUFFER_SIZE + 1);
    }

     */
    protected InputStreamThread inputStreamThread;

    /**
     * Constructs a new JobProcess with the specified process.
     * Uses the default buffer size and no output callback.
     *
     * @param process the system process to wrap
     */
    public JobProcess(final Process process) {
        this(process, InputStreamThread.MAX_BUFFER_SIZE, null);
    }

    /**

            currentProcess = pb.start();

            // monitoring
            mt = new MonitorThread(currentProcess, executionTimeout);
            mt.start();

            final InputStreamThread it = new InputStreamThread(currentProcess.getInputStream(), commandOutputEncoding, maxOutputLine);
            it.start();

            currentProcess.waitFor();
            it.join(5000);

import org.codelibs.core.io.CopyUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;

import jakarta.annotation.PostConstruct;

/**
 * Command-based thumbnail generator that executes external commands to create thumbnails.

import org.codelibs.core.io.CloseableUtil;
import org.codelibs.fess.Constants;
import org.codelibs.fess.exception.JobNotFoundException;
import org.codelibs.fess.exception.JobProcessingException;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;

import jakarta.annotation.PreDestroy;

/**
 * Helper class for managing system processes in Fess.

import org.codelibs.fess.helper.SystemHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;

import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;

import jakarta.servlet.ServletContext;

public class GenerateThumbnailJobTest extends UnitFessTestCase {

    private GenerateThumbnailJob thumbnailJob;

import org.codelibs.fess.helper.ProcessHelper;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;
import org.codelibs.fess.util.SystemUtil;

import jakarta.servlet.ServletContext;

/**
 * Job for executing Python scripts within the Fess search engine environment.

        @Override
        public InputStreamThread getInputStreamThread() {
            return new MockInputStreamThread(output);
        }

        @Override
        public Process getProcess() {
            return new MockProcess(exitValue);
        }
    }

    // Mock InputStreamThread implementation
    private class MockInputStreamThread extends InputStreamThread {
        private final String output;