1 /* 2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot.services; 24 25 /** 26 * An empty implementation for {@link EventProvider}. This implementation is used when no logging is 27 * requested. 28 */ 29 final class EmptyEventProvider extends EventProvider { 30 31 EmptyEventProvider() { 32 super(null); 33 } 34 35 static InternalError shouldNotReachHere() { 36 throw new InternalError("should not reach here"); 37 } 38 39 @Override 40 public CompilationEvent newCompilationEvent() { 41 return new EmptyCompilationEvent(); 42 } 43 44 static class EmptyCompilationEvent implements CompilationEvent { 45 public void commit() { 46 throw shouldNotReachHere(); 47 } 48 49 public boolean shouldWrite() { 50 // Events of this class should never been written. 51 return false; 52 } 53 54 public void begin() { 55 } 56 57 public void end() { 58 } 59 60 public void setMethod(String method) { 61 throw shouldNotReachHere(); 62 } 63 64 public void setCompileId(int compileId) { 65 throw shouldNotReachHere(); 66 } 67 68 public void setCompileLevel(int compileLevel) { 69 throw shouldNotReachHere(); 70 } 71 72 public void setSucceeded(boolean succeeded) { 73 throw shouldNotReachHere(); 74 } 75 76 public void setIsOsr(boolean isOsr) { 77 throw shouldNotReachHere(); 78 } 79 80 public void setCodeSize(int codeSize) { 81 throw shouldNotReachHere(); 82 } 83 84 public void setInlinedBytes(int inlinedBytes) { 85 throw shouldNotReachHere(); 86 } 87 } 88 89 @Override 90 public CompilerFailureEvent newCompilerFailureEvent() { 91 return new EmptyCompilerFailureEvent(); 92 } 93 94 static class EmptyCompilerFailureEvent implements CompilerFailureEvent { 95 public void commit() { 96 throw shouldNotReachHere(); 97 } 98 99 public boolean shouldWrite() { 100 // Events of this class should never been written. 101 return false; 102 } 103 104 public void setCompileId(int compileId) { 105 throw shouldNotReachHere(); 106 } 107 108 public void setMessage(String message) { 109 throw shouldNotReachHere(); 110 } 111 } 112 113 }