1 package org.onap.vid.controller;
3 import ch.qos.logback.classic.LoggerContext;
4 import ch.qos.logback.core.Appender;
5 import ch.qos.logback.core.FileAppender;
6 import ch.qos.logback.core.spi.AppenderAttachable;
7 import org.apache.commons.io.input.ReversedLinesFileReader;
8 import org.apache.commons.lang3.StringUtils;
9 import org.onap.portalsdk.core.controller.RestrictedBaseController;
10 import org.onap.portalsdk.core.logging.logic.EELFLoggerDelegate;
11 import org.onap.vid.model.ExceptionResponse;
12 import org.onap.vid.roles.Role;
13 import org.onap.vid.roles.RoleProvider;
14 import org.onap.vid.utils.Streams;
15 import org.slf4j.LoggerFactory;
16 import org.springframework.beans.factory.annotation.Autowired;
17 import org.springframework.http.HttpStatus;
18 import org.springframework.web.bind.annotation.*;
20 import javax.servlet.http.HttpServletRequest;
21 import javax.ws.rs.InternalServerErrorException;
22 import javax.ws.rs.NotAuthorizedException;
24 import java.io.IOException;
25 import java.util.List;
26 import java.util.Objects;
27 import java.util.function.Supplier;
28 import java.util.stream.Collectors;
29 import java.util.stream.Stream;
31 import static com.att.eelf.configuration.Configuration.GENERAL_LOGGER_NAME;
35 @RequestMapping("logger")
36 public class LoggerController extends RestrictedBaseController {
38 private static final EELFLoggerDelegate LOGGER = EELFLoggerDelegate.getLogger(LoggerController.class);
41 RoleProvider roleProvider;
43 @RequestMapping(value = "/{loggerName:audit|error|metrics}", method = RequestMethod.GET)
44 public String getLog(@PathVariable String loggerName, HttpServletRequest request,
45 @RequestParam(value="limit", defaultValue = "5000") Integer limit) throws IOException {
47 List<Role> roles = roleProvider.getUserRoles(request);
48 boolean userPermitted = roleProvider.userPermissionIsReadLogs(roles);
50 throw new NotAuthorizedException("User not authorized to get logs");
53 String logfilePath = getLogfilePath(loggerName);
55 try (final ReversedLinesFileReader reader = new ReversedLinesFileReader(new File(logfilePath))) {
56 Supplier<String> reverseLinesSupplier = () -> {
58 return reader.readLine();
59 } catch (NullPointerException e) {
62 } catch (IOException e) {
63 throw new InternalServerErrorException("error while reading " + logfilePath, e);
67 return Streams.takeWhile(
68 Stream.generate(reverseLinesSupplier),
69 line -> !StringUtils.contains(line, "Logging is started"))
72 .filter(Objects::nonNull)
73 .collect(Collectors.joining("\n"));
77 private String getLogfilePath(String loggerName) {
79 Find the requested logger, and pull all of it's appenders.
80 Find the first of the appenders that is a FileAppender, and return it's
83 LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
84 return context.getLoggerList().stream()
85 .filter(logger -> logger.getName().equals(GENERAL_LOGGER_NAME + "." + loggerName))
86 .flatMap(this::pullSubAppenders)
87 .flatMap(appender -> {
88 // Appender might be "attachable", if so - roll-up its sub-appenders
89 return (appender instanceof AppenderAttachable) ?
90 pullSubAppenders((AppenderAttachable<?>) appender) : Stream.of(appender);
92 .filter(appender -> appender instanceof FileAppender)
93 .map(appender -> (FileAppender<?>) appender)
94 .map(FileAppender::getFile)
96 .orElseThrow(() -> new InternalServerErrorException("logfile for " + loggerName + " not found"));
99 private <T> Stream<Appender<T>> pullSubAppenders(AppenderAttachable<T> logger) {
100 return Streams.fromIterator(logger.iteratorForAppenders());
103 @ExceptionHandler({ NotAuthorizedException.class })
104 @ResponseStatus(HttpStatus.UNAUTHORIZED)
105 public String notAuthorizedHandler(NotAuthorizedException e) {
106 return "UNAUTHORIZED";
109 @ExceptionHandler({ IOException.class, InternalServerErrorException.class })
110 @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
111 public ExceptionResponse ioExceptionHandler(Exception e) {
112 return ControllersUtils.handleException(e, LOGGER);