diff options
| -rw-r--r-- | src/core/lombok/core/debug/AssertionLogger.java | 115 | ||||
| -rw-r--r-- | src/core/lombok/javac/JavacResolution.java | 2 |
2 files changed, 117 insertions, 0 deletions
diff --git a/src/core/lombok/core/debug/AssertionLogger.java b/src/core/lombok/core/debug/AssertionLogger.java new file mode 100644 index 00000000..6b2c326d --- /dev/null +++ b/src/core/lombok/core/debug/AssertionLogger.java @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2015 The Project Lombok Authors. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +package lombok.core.debug; + +import java.io.FileOutputStream; +import java.io.OutputStream; +import java.io.PrintWriter; +import java.io.StringWriter; +import java.util.Date; +import java.util.Random; +import java.util.concurrent.atomic.AtomicBoolean; + +import lombok.core.Version; + +/** + * We make a number of assumptions in lombok code, and if these assumptions fail, we try to fall back to a 'least bad' scenario. However, we would prefer to + * just know about these cases, without confronting our users with error messages. The 'fix' is to log such assertion failures to this logger, which promptly + * ignores them, _unless_ you specifically enable logging them to a file. If you'd like to help out or want to assist in debugging, turn this on. + */ +public class AssertionLogger { + private static final String LOG_PATH; + + static { + String log = System.getProperty("lombok.assertion.log", null); + if (log != null) { + LOG_PATH = log.isEmpty() ? null : log; + } else { + try { + log = System.getenv("LOMBOK_ASSERTION_LOG"); + } catch (Exception e) { + log = null; + } + LOG_PATH = (log == null || log.isEmpty()) ? null : log; + } + } + + private static final AtomicBoolean loggedIntro = new AtomicBoolean(false); + private static final String PROCESS_ID = generateProcessId(); + + private static final String ID_CHARS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; + + private static String generateProcessId() { + char[] ID = new char[4]; + Random r = new Random(); + for (int i = 0; i < ID.length; i++) ID[i] = ID_CHARS.charAt(r.nextInt(ID_CHARS.length())); + return new String(ID); + } + + private static synchronized void logToFile(String msg) { + if (msg == null) return; + + try { + OutputStream out = new FileOutputStream(LOG_PATH, true); + out.write(msg.getBytes("UTF-8")); + out.close(); + } catch (Exception e) { + throw new RuntimeException("assertion logging can't write to log file", e); + } + } + + private static void logIntro() { + if (loggedIntro.getAndSet(true)) return; + + String version; + try { + version = Version.getFullVersion(); + } catch (Exception e) { + version = Version.getVersion(); + } + + logToFile(String.format("{%s} [%s -- START %s]\n", PROCESS_ID, new Date(), version)); + } + + public static <T extends Throwable> T assertLog(String message, T throwable) { + if (LOG_PATH == null) return throwable; + + logIntro(); + + if (message == null) message = "(No message)"; + String stackMsg = ""; + if (throwable != null) { + StringWriter sw = new StringWriter(); + PrintWriter pw = new PrintWriter(sw); + throwable.printStackTrace(pw); + pw.close(); + stackMsg = "\n " + sw.toString().replace("\r", "").replace("\n", "\n ").trim(); + } + logToFile(String.format("{%s} [%ty%<tm%<tdT%<tH%<tM%<tS.%<tL] %s%s\n", PROCESS_ID, new Date(), message, stackMsg)); + return throwable; + } + + public static void assertLog(String message) { + if (LOG_PATH == null) return; + assertLog(message, null); + } +} diff --git a/src/core/lombok/javac/JavacResolution.java b/src/core/lombok/javac/JavacResolution.java index 6231735c..67dbaac6 100644 --- a/src/core/lombok/javac/JavacResolution.java +++ b/src/core/lombok/javac/JavacResolution.java @@ -33,6 +33,7 @@ import java.util.Map; import javax.lang.model.type.TypeKind; import lombok.Lombok; +import lombok.core.debug.AssertionLogger; import com.sun.tools.javac.code.BoundKind; import com.sun.tools.javac.code.Symbol.TypeSymbol; @@ -191,6 +192,7 @@ public class JavacResolution { copy.accept(memberEnter); } catch (Exception ignore) { // intentionally ignored; usually even if this step fails, val will work (but not for val in method local inner classes and anonymous inner classes). + AssertionLogger.assertLog("member enter failed.", ignore); } finally { setEnvOfMemberEnter(memberEnter, oldEnv); } |