1 /* 2 * Copyright (c) 2016, 2018, 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 */ 24 25 #ifndef SHARE_VM_JFR_UTILITIES_JFRJAVALOG_HPP 26 #define SHARE_VM_JFR_UTILITIES_JFRJAVALOG_HPP 27 28 #include "memory/allocation.hpp" 29 #include "utilities/exceptions.hpp" 30 31 /* 32 * A thin two-way "bridge" allowing our Java components to interface with Unified Logging (UL) 33 * 34 * Java can "subscribe" to be notified about UL configuration changes. 35 * On such a configuration change, if applicable, the passed in LogTag enum instance 36 * will be updated to reflect a new LogLevel. 37 * 38 * Log messages originating in Java are forwarded to UL for output. 39 * 40 */ 41 42 class JfrJavaLog : public AllStatic { 43 public: 44 static void subscribe_log_level(jobject log_tag, jint id, TRAPS); 45 static void log(jint tag_set, jint level, jstring message, TRAPS); 46 }; 47 48 #endif // SHARE_VM_JFR_UTILITIES_JFRJAVALOG_HPP