com.predic8.membrane.core.exceptions.SpringConfigurationErrorHandler Maven / Gradle / Ivy
/* Copyright 2023 predic8 GmbH, www.predic8.com
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. */
package com.predic8.membrane.core.exceptions;
import com.predic8.membrane.core.interceptor.ratelimit.*;
import com.predic8.membrane.core.transport.*;
import com.predic8.membrane.core.util.*;
import org.apache.commons.lang3.exception.*;
import org.slf4j.*;
import org.springframework.beans.*;
import java.beans.*;
import static com.predic8.membrane.core.util.OSUtil.getOS;
import static java.util.Objects.requireNonNull;
public class SpringConfigurationErrorHandler {
public static final String STARS = "**********************************************************************************";
public static void handleRootCause(Exception e, Logger log) {
Throwable root = ExceptionUtils.getRootCause(e);
if (root instanceof PropertyBatchUpdateException pbue) {
handlePropertyBatchUpdateException(log, pbue);
} else if (root instanceof ConfigurationException ee) {
handleConfigurationException(ee);
} else if (root instanceof PortOccupiedException poe) {
handlePortOccupiedException(poe);
} else {
e.printStackTrace();
}
}
private static void handlePortOccupiedException(PortOccupiedException poe) {
System.err.printf("""
%s
Membrane is configured to open port %d. But this port is already in"
use by a different program. To start Membrane do one of the following:
1. Find and stop the program that is occupying the port. Then restart Membrane.
%s
2. Configure Membrane to use a different port. Probably in the conf/proxies.xml
file. Then restart Membrane.
%n""", STARS, poe.getPort(), getHowToFindPort());
}
private static String getHowToFindPort() {
return switch (getOS()) {
case WINDOWS -> getHowToFindPortWindows();
case LINUX, MAC -> getHowToFindPortLinux();
case UNKNOWN -> "";
};
}
private static String getHowToFindPortLinux() {
return """
e.g.:
> lsof -i :2000
COMMAND PID USER TYPE
java 80910 predic8 IPv6 TCP (LISTEN)
> kill -9 80910
""";
}
private static String getHowToFindPortWindows() {
return """
netstat -aon | find /i "listening"
""";
}
private static void handleConfigurationException(ConfigurationException ce) {
System.err.printf("""
%s
%s
giving up.
%n""", STARS, ce.getMessage());
}
private static void handlePropertyBatchUpdateException(Logger log, PropertyBatchUpdateException pbue) {
for(Exception ie : pbue.getPropertyAccessExceptions()) {
if (ie instanceof MethodInvocationException mie) {
PropertyChangeEvent pce = mie.getPropertyChangeEvent();
//noinspection SwitchStatementWithTooFewBranches
switch (requireNonNull(pce).getPropertyName()) {
case "requestLimitDuration" -> RateLimitErrorHandling.handleRequestLimitDurationConfigurationException(log, pce);
default -> log.error("""
Invalid value %s for property %s.""".formatted(pce.getNewValue(),pce.getPropertyName()));
}
}
}
}
}