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Diffstat (limited to 'openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/api/LoggerFactory.java')
| -rw-r--r-- | openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/api/LoggerFactory.java | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/api/LoggerFactory.java b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/api/LoggerFactory.java new file mode 100644 index 0000000000..7029ded38d --- /dev/null +++ b/openecomp-be/lib/openecomp-logging-lib/openecomp-sdc-logging-api/src/main/java/org/openecomp/sdc/logging/api/LoggerFactory.java @@ -0,0 +1,207 @@ +/*- + * ============LICENSE_START======================================================= + * SDC + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * ============LICENSE_END========================================================= + */ + +package org.openecomp.sdc.logging.api; + + +/** + * <a>Factory to hide a concrete, framework-specific implementation of logger creation.</a> + * + * <p>The service used by this factory must implement {@link LoggerCreationService}. If no implementation has been + * configured or could not be instantiated, a <b>no-op logger</b> will be used, and <b>no events</b> will be logged. + * This is done to prevent recursion if attempts are being made to log exceptions that resulted from logger + * initialization. + * </p> + * + * @author evitaliy + * @since 13/09/2016. + * + * @see BaseFactory + * @see LoggerCreationService + */ +@SuppressWarnings("ThrowableInstanceNeverThrown") +public class LoggerFactory extends BaseFactory { + + private static final LoggerCreationService SERVICE; + + static { + LoggerCreationService service; + + try { + service = locateService(LoggerCreationService.class); + } catch (Throwable e) { + new RuntimeException("Failed to instantiate logger factory", e).printStackTrace(); + // use the no-op service to prevent recursion in case of an attempt to log an exception as a + // result of a logger initialization error + service = new NoOpLoggerCreationService(); + } + + SERVICE = service; + } + + public static Logger getLogger(String clazzName) { + return SERVICE.getLogger(clazzName); + } + + public static Logger getLogger(Class<?> clazz) { + return SERVICE.getLogger(clazz); + } + + private static class NoOpLoggerCreationService implements LoggerCreationService { + + private static final Logger NO_OP_LOGGER = new Logger() { + + @Override + public String getName() { + return "No-Op Logger"; + } + + @Override + public boolean isMetricsEnabled() { + return false; + } + + @Override + public void metrics(String msg) { } + + @Override + public void metrics(String msg, Object arg) { } + + @Override + public void metrics(String msg, Object arg1, Object arg2) { } + + @Override + public void metrics(String msg, Object... arguments) { } + + @Override + public void metrics(String msg, Throwable t) { } + + @Override + public boolean isAuditEnabled() { + return false; + } + + @Override + public void audit(String msg) { } + + @Override + public void audit(String msg, Object arg) { } + + @Override + public void audit(String msg, Object arg1, Object arg2) { } + + @Override + public void audit(String msg, Object... arguments) { } + + @Override + public void audit(String msg, Throwable t) { } + + @Override + public boolean isDebugEnabled() { + return false; + } + + @Override + public void debug(String msg) { } + + @Override + public void debug(String msg, Object arg) { } + + @Override + public void debug(String msg, Object arg1, Object arg2) { } + + @Override + public void debug(String msg, Object... arguments) { } + + @Override + public void debug(String msg, Throwable t) { } + + @Override + public boolean isInfoEnabled() { + return false; + } + + @Override + public void info(String msg) { } + + @Override + public void info(String msg, Object arg) { } + + @Override + public void info(String msg, Object arg1, Object arg2) { } + + @Override + public void info(String msg, Object... arguments) { } + + @Override + public void info(String msg, Throwable t) { } + + @Override + public boolean isWarnEnabled() { + return false; + } + + @Override + public void warn(String msg) { } + + @Override + public void warn(String msg, Object arg) { } + + @Override + public void warn(String msg, Object... arguments) { } + + @Override + public void warn(String msg, Object arg1, Object arg2) { } + + @Override + public void warn(String msg, Throwable t) { } + + @Override + public boolean isErrorEnabled() { + return false; + } + + @Override + public void error(String msg) { } + + @Override + public void error(String msg, Object arg) { } + + @Override + public void error(String msg, Object arg1, Object arg2) { } + + @Override + public void error(String msg, Object... arguments) { } + + @Override + public void error(String msg, Throwable t) { } + }; + + @Override + public Logger getLogger(String className) { + return NO_OP_LOGGER; + } + + @Override + public Logger getLogger(Class<?> clazz) { + return NO_OP_LOGGER; + } + } +} |