private void copyLogTail() {
if (configuration.getTailLogLinesToSave() <= 0) {
return;
}
final Path tailOfLogPath =
taskDefinition.getTaskDirectoryPath().resolve(configuration.getServiceFinishedTailLog());
if (Files.exists(tailOfLogPath)) {
log.debug("{} already existed, skipping tail", tailOfLogPath);
return;
}
final List<String> cmd =
ImmutableList.of(
"tail",
"-n",
Integer.toString(configuration.getTailLogLinesToSave()),
taskDefinition.getServiceLogOut());
try {
new SimpleProcessManager(log).runCommand(cmd, Redirect.to(tailOfLogPath.toFile()));
} catch (Throwable t) {
log.error(
"Failed saving tail of log {} to {}",
taskDefinition.getServiceLogOut(),
configuration.getServiceFinishedTailLog(),
t);
}
}
private void ensureServiceOutExists() {
try {
if (!Files.exists(taskDefinition.getServiceLogOutPath())) {
Files.createFile(taskDefinition.getServiceLogOutPath());
}
} catch (FileAlreadyExistsException faee) {
log.debug("Executor out {} already existed", taskDefinition.getServiceLogOut());
} catch (Throwable t) {
log.error("Failed creating executor out {}", taskDefinition.getServiceLogOut(), t);
}
}
private boolean writeTailMetadata(boolean finished) {
if (!taskDefinition.getExecutorData().getLoggingTag().isPresent()) {
if (!finished) {
log.warn("Not writing logging metadata because logging tag is absent");
}
return true;
}
final TailMetadata tailMetadata =
new TailMetadata(
taskDefinition.getServiceLogOut(),
taskDefinition.getExecutorData().getLoggingTag().get(),
taskDefinition.getExecutorData().getLoggingExtraFields(),
finished);
final Path path =
TailMetadata.getTailMetadataPath(
configuration.getLogMetadataDirectory(),
configuration.getLogMetadataSuffix(),
tailMetadata);
return jsonObjectFileHelper.writeObject(tailMetadata, path, log);
}
