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java/org/apache/catalina/startup/CatalinaProperties.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 org.apache.catalina.startup;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Enumeration;
+import java.util.Properties;
+
+import org.apache.juli.logging.Log;
+import org.apache.juli.logging.LogFactory;
+
+
+/**
+ * Utility class to read the bootstrap Catalina configuration.
+ *
+ * @author Remy Maucherat
+ */
+public class CatalinaProperties {
+
+    private static final Log log = LogFactory.getLog(CatalinaProperties.class);
+
+    private static Properties properties = null;
+
+
+    static {
+        loadProperties();
+    }
+
+
+    /**
+     * @param name The property name
+     * @return specified property value
+     */
+    public static String getProperty(String name) {
+        return properties.getProperty(name);
+    }
+
+
+    /**
+     * Load properties.
+     */
+    private static void loadProperties() {
+
+        InputStream is = null;
+        try {
+            String configUrl = System.getProperty("catalina.config");
+            if (configUrl != null) {
+                is = (new URL(configUrl)).openStream();
+            }
+        } catch (Throwable t) {
+            handleThrowable(t);
+        }
+
+        if (is == null) {
+            try {
+                File home = new File(Bootstrap.getCatalinaBase());
+                File conf = new File(home, "conf");
+                File propsFile = new File(conf, "catalina.properties");
+                is = new FileInputStream(propsFile);
+            } catch (Throwable t) {
+                handleThrowable(t);
+            }
+        }
+
+        if (is == null) {
+            try {
+                is = CatalinaProperties.class.getResourceAsStream
+                    ("/org/apache/catalina/startup/catalina.properties");
+            } catch (Throwable t) {
+                handleThrowable(t);
+            }
+        }
+
+        if (is != null) {
+            try {
+                properties = new Properties();
+                properties.load(is);
+            } catch (Throwable t) {
+                handleThrowable(t);
+                log.warn(t);
+            } finally {
+                try {
+                    is.close();
+                } catch (IOException ioe) {
+                    log.warn("Could not close catalina.properties", ioe);
+                }
+            }
+        }
+
+        if ((is == null)) {
+            // Do something
+            log.warn("Failed to load catalina.properties");
+            // That's fine - we have reasonable defaults.
+            properties = new Properties();
+        }
+
+        // Register the properties as system properties
+        Enumeration<?> enumeration = properties.propertyNames();
+        while (enumeration.hasMoreElements()) {
+            String name = (String) enumeration.nextElement();
+            String value = properties.getProperty(name);
+            if (value != null) {
+                System.setProperty(name, value);
+            }
+        }
+    }
+
+
+    // Copied from ExceptionUtils since that class is not visible during start
+    private static void handleThrowable(Throwable t) {
+        if (t instanceof ThreadDeath) {
+            throw (ThreadDeath) t;
+        }
+        if (t instanceof VirtualMachineError) {
+            throw (VirtualMachineError) t;
+        }
+        // All other instances of Throwable will be silently swallowed
+    }
+}