| /* |
| * 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.logging.log4j.core.config.json; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.logging.log4j.core.config.AbstractConfiguration; |
| import org.apache.logging.log4j.core.config.Configuration; |
| import org.apache.logging.log4j.core.config.ConfigurationSource; |
| import org.apache.logging.log4j.core.config.FileConfigurationMonitor; |
| import org.apache.logging.log4j.core.config.Node; |
| import org.apache.logging.log4j.core.config.Reconfigurable; |
| import org.apache.logging.log4j.core.config.plugins.util.PluginManager; |
| import org.apache.logging.log4j.core.config.plugins.util.PluginType; |
| import org.apache.logging.log4j.core.config.plugins.util.ResolverUtil; |
| import org.apache.logging.log4j.core.config.status.StatusConfiguration; |
| import org.apache.logging.log4j.core.util.Patterns; |
| |
| import com.fasterxml.jackson.core.JsonParser; |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| |
| /** |
| * Creates a Node hierarchy from a JSON file. |
| */ |
| public class JsonConfiguration extends AbstractConfiguration implements Reconfigurable { |
| |
| private static final String[] VERBOSE_CLASSES = new String[] { ResolverUtil.class.getName() }; |
| private final List<Status> status = new ArrayList<Status>(); |
| private JsonNode root; |
| |
| public JsonConfiguration(final ConfigurationSource configSource) { |
| super(configSource); |
| final File configFile = configSource.getFile(); |
| byte[] buffer; |
| try { |
| final InputStream configStream = configSource.getInputStream(); |
| try { |
| buffer = toByteArray(configStream); |
| } finally { |
| configStream.close(); |
| } |
| final InputStream is = new ByteArrayInputStream(buffer); |
| root = getObjectMapper().readTree(is); |
| if (root.size() == 1) { |
| for (final JsonNode node : root) { |
| root = node; |
| } |
| } |
| processAttributes(rootNode, root); |
| final StatusConfiguration statusConfig = new StatusConfiguration().withVerboseClasses(VERBOSE_CLASSES) |
| .withStatus(getDefaultStatus()); |
| for (final Map.Entry<String, String> entry : rootNode.getAttributes().entrySet()) { |
| final String key = entry.getKey(); |
| final String value = getStrSubstitutor().replace(entry.getValue()); |
| if ("status".equalsIgnoreCase(key)) { |
| statusConfig.withStatus(value); |
| } else if ("dest".equalsIgnoreCase(key)) { |
| statusConfig.withDestination(value); |
| } else if ("shutdownHook".equalsIgnoreCase(key)) { |
| isShutdownHookEnabled = !"disable".equalsIgnoreCase(value); |
| } else if ("verbose".equalsIgnoreCase(entry.getKey())) { |
| statusConfig.withVerbosity(value); |
| } else if ("packages".equalsIgnoreCase(key)) { |
| final String[] packages = value.split(Patterns.COMMA_SEPARATOR); |
| for (final String p : packages) { |
| PluginManager.addPackage(p); |
| } |
| } else if ("name".equalsIgnoreCase(key)) { |
| setName(value); |
| } else if ("monitorInterval".equalsIgnoreCase(key)) { |
| final int interval = Integer.parseInt(value); |
| if (interval > 0 && configFile != null) { |
| monitor = new FileConfigurationMonitor(this, configFile, listeners, interval); |
| } |
| } else if ("advertiser".equalsIgnoreCase(key)) { |
| createAdvertiser(value, configSource, buffer, "application/json"); |
| } |
| } |
| statusConfig.initialize(); |
| if (getName() == null) { |
| setName(configSource.getLocation()); |
| } |
| } catch (final Exception ex) { |
| LOGGER.error("Error parsing {}", configSource.getLocation(), ex); |
| } |
| } |
| |
| protected ObjectMapper getObjectMapper() { |
| return new ObjectMapper().configure(JsonParser.Feature.ALLOW_COMMENTS, true); |
| } |
| |
| @Override |
| public void setup() { |
| final Iterator<Map.Entry<String, JsonNode>> iter = root.fields(); |
| final List<Node> children = rootNode.getChildren(); |
| while (iter.hasNext()) { |
| final Map.Entry<String, JsonNode> entry = iter.next(); |
| final JsonNode n = entry.getValue(); |
| if (n.isObject()) { |
| LOGGER.debug("Processing node for object {}", entry.getKey()); |
| children.add(constructNode(entry.getKey(), rootNode, n)); |
| } else if (n.isArray()) { |
| LOGGER.error("Arrays are not supported at the root configuration."); |
| } |
| } |
| LOGGER.debug("Completed parsing configuration"); |
| if (status.size() > 0) { |
| for (final Status s : status) { |
| LOGGER.error("Error processing element " + s.name + ": " + s.errorType); |
| } |
| } |
| } |
| |
| @Override |
| public Configuration reconfigure() { |
| try { |
| final ConfigurationSource source = getConfigurationSource().resetInputStream(); |
| if (source == null) { |
| return null; |
| } |
| return new JsonConfiguration(source); |
| } catch (final IOException ex) { |
| LOGGER.error("Cannot locate file {}", getConfigurationSource(), ex); |
| } |
| return null; |
| } |
| |
| private Node constructNode(final String name, final Node parent, final JsonNode jsonNode) { |
| final PluginType<?> type = pluginManager.getPluginType(name); |
| final Node node = new Node(parent, name, type); |
| processAttributes(node, jsonNode); |
| final Iterator<Map.Entry<String, JsonNode>> iter = jsonNode.fields(); |
| final List<Node> children = node.getChildren(); |
| while (iter.hasNext()) { |
| final Map.Entry<String, JsonNode> entry = iter.next(); |
| final JsonNode n = entry.getValue(); |
| if (n.isArray() || n.isObject()) { |
| if (type == null) { |
| status.add(new Status(name, n, ErrorType.CLASS_NOT_FOUND)); |
| } |
| if (n.isArray()) { |
| LOGGER.debug("Processing node for array {}", entry.getKey()); |
| for (int i = 0; i < n.size(); ++i) { |
| final String pluginType = getType(n.get(i), entry.getKey()); |
| final PluginType<?> entryType = pluginManager.getPluginType(pluginType); |
| final Node item = new Node(node, entry.getKey(), entryType); |
| processAttributes(item, n.get(i)); |
| if (pluginType.equals(entry.getKey())) { |
| LOGGER.debug("Processing {}[{}]", entry.getKey(), i); |
| } else { |
| LOGGER.debug("Processing {} {}[{}]", pluginType, entry.getKey(), i); |
| } |
| final Iterator<Map.Entry<String, JsonNode>> itemIter = n.get(i).fields(); |
| final List<Node> itemChildren = item.getChildren(); |
| while (itemIter.hasNext()) { |
| final Map.Entry<String, JsonNode> itemEntry = itemIter.next(); |
| if (itemEntry.getValue().isObject()) { |
| LOGGER.debug("Processing node for object {}", itemEntry.getKey()); |
| itemChildren.add(constructNode(itemEntry.getKey(), item, itemEntry.getValue())); |
| } else if (itemEntry.getValue().isArray()) { |
| final JsonNode array = itemEntry.getValue(); |
| final String entryName = itemEntry.getKey(); |
| LOGGER.debug("Processing array for object {}", entryName); |
| for (int j = 0; j < array.size(); ++j) { |
| itemChildren.add(constructNode(entryName, item, array.get(j))); |
| } |
| } |
| |
| } |
| children.add(item); |
| } |
| } else { |
| LOGGER.debug("Processing node for object {}", entry.getKey()); |
| children.add(constructNode(entry.getKey(), node, n)); |
| } |
| } else { |
| LOGGER.debug("Node {} is of type {}", entry.getKey(), n.getNodeType()); |
| } |
| } |
| |
| String t; |
| if (type == null) { |
| t = "null"; |
| } else { |
| t = type.getElementName() + ':' + type.getPluginClass(); |
| } |
| |
| final String p = node.getParent() == null ? "null" : node.getParent().getName() == null ? "root" : node |
| .getParent().getName(); |
| LOGGER.debug("Returning {} with parent {} of type {}", node.getName(), p, t); |
| return node; |
| } |
| |
| private String getType(final JsonNode node, final String name) { |
| final Iterator<Map.Entry<String, JsonNode>> iter = node.fields(); |
| while (iter.hasNext()) { |
| final Map.Entry<String, JsonNode> entry = iter.next(); |
| if (entry.getKey().equalsIgnoreCase("type")) { |
| final JsonNode n = entry.getValue(); |
| if (n.isValueNode()) { |
| return n.asText(); |
| } |
| } |
| } |
| return name; |
| } |
| |
| private void processAttributes(final Node parent, final JsonNode node) { |
| final Map<String, String> attrs = parent.getAttributes(); |
| final Iterator<Map.Entry<String, JsonNode>> iter = node.fields(); |
| while (iter.hasNext()) { |
| final Map.Entry<String, JsonNode> entry = iter.next(); |
| if (!entry.getKey().equalsIgnoreCase("type")) { |
| final JsonNode n = entry.getValue(); |
| if (n.isValueNode()) { |
| attrs.put(entry.getKey(), n.asText()); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "[location=" + getConfigurationSource() + "]"; |
| } |
| |
| /** |
| * The error that occurred. |
| */ |
| private enum ErrorType { |
| CLASS_NOT_FOUND |
| } |
| |
| /** |
| * Status for recording errors. |
| */ |
| private static class Status { |
| private final JsonNode node; |
| private final String name; |
| private final ErrorType errorType; |
| |
| public Status(final String name, final JsonNode node, final ErrorType errorType) { |
| this.name = name; |
| this.node = node; |
| this.errorType = errorType; |
| } |
| } |
| } |