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(control) Don't spin on process output printing

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This is the "correct" way of copying stdout and stderr to the curren't process' output.
This commit is contained in:
Viktor Lofgren 2023-08-22 11:48:54 +02:00
parent 46409c4c2d
commit c7f0276005
1 changed files with 51 additions and 12 deletions
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63
code/services-core/control-service/src/main/java/nu/marginalia/control/process/ProcessService.java
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@ -11,6 +11,7 @@ import org.slf4j.MarkerFactory;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.file.Files;
import java.nio.file.Path;
@ -72,24 +73,16 @@ public class ProcessService {
processes.put(processId, process);
}
try (var es = new BufferedReader(new InputStreamReader(process.getErrorStream()));
var os = new BufferedReader(new InputStreamReader(process.getInputStream()))
) {
eventLog.logEvent("PROCESS-STARTED", processId.toString());
while (process.isAlive()) {
if (es.ready())
logger.warn(processMarker, es.readLine());
if (os.ready())
logger.info(processMarker, os.readLine());
}
try {
new Thread(new ProcessLogStderr(process)).start();
new Thread(new ProcessLogStdout(process)).start();
final int returnCode = process.waitFor();
logger.info("Process {} terminated with code {}", processId, returnCode);
return 0 == returnCode;
}
catch (Exception ex) {
logger.info("Process {} terminated with code exception", processId);
logger.info("Process {} terminated with exception", processId);
throw ex;
}
finally {
@ -98,6 +91,7 @@ public class ProcessService {
}
}
private String[] createCommandArguments(String processPath, String[] parameters) {
final String[] args = new String[parameters.length + 1];
args[0] = processPath;
@ -153,4 +147,49 @@ public class ProcessService {
return key + "=" + val;
}
class ProcessLogStderr implements Runnable {
private final Process process;
public ProcessLogStderr(Process process) {
this.process = process;
}
@Override
public void run() {
try (var es = new BufferedReader(new InputStreamReader(process.getErrorStream()))) {
String line;
while (((line = es.readLine()) != null)) {
logger.warn(processMarker, line);
}
}
catch (IOException ex) {
logger.error("Error reading process error stream", ex);
}
}
}
class ProcessLogStdout implements Runnable {
private final Process process;
public ProcessLogStdout(Process process) {
this.process = process;
}
@Override
public void run() {
try (var is = new BufferedReader(new InputStreamReader(process.getInputStream()))) {
String line;
while (((line = is.readLine()) != null)) {
logger.info(processMarker, line);
}
}
catch (IOException ex) {
logger.error("Error reading process output stream", ex);
}
}
}
}