SerializedRecord.java
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上传日期:2018-01-08
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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.hadoop.contrib.failmon;
- import java.net.InetAddress;
- import java.util.ArrayList;
- import java.util.Calendar;
- import java.util.HashMap;
- import java.text.DateFormat;
- /**********************************************************
- * Objects of this class hold the serialized representations
- * of EventRecords. A SerializedRecord is essentially an EventRecord
- * with all its property values converted to strings. It also provides
- * some convenience methods for printing the property fields in a
- * more readable way.
- *
- **********************************************************/
- public class SerializedRecord {
- HashMap<String, String> fields;
- private static DateFormat dateFormatter =
- DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG);;
- /**
- * Create the SerializedRecord given an EventRecord.
- */
-
- public SerializedRecord(EventRecord source) {
- fields = new HashMap<String, String>();
- fields.clear();
- for (String k : source.getMap().keySet()) {
- ArrayList<String> strs = getStrings(source.getMap().get(k));
- if (strs.size() == 1)
- fields.put(k, strs.get(0));
- else
- for (int i = 0; i < strs.size(); i++)
- fields.put(k + "#" + i, strs.get(i));
- }
- }
- /**
- * Extract String representations from an Object.
- *
- * @param o the input object
- *
- * @return an ArrayList that contains Strings found in o
- */
- private ArrayList<String> getStrings(Object o) {
- ArrayList<String> retval = new ArrayList<String>();
- retval.clear();
- if (o == null)
- retval.add("null");
- else if (o instanceof String)
- retval.add((String) o);
- else if (o instanceof Calendar)
- retval.add(dateFormatter.format(((Calendar) o).getTime()));
- else if (o instanceof InetAddress[])
- for (InetAddress ip : ((InetAddress[]) o))
- retval.add(ip.getHostAddress());
- else if (o instanceof String[])
- for (String s : (String []) o)
- retval.add(s);
- else
- retval.add(o.toString());
- return retval;
- }
- /**
- * Set the value of a property of the EventRecord.
- *
- * @param fieldName the name of the property to set
- * @param fieldValue the value of the property to set
- *
- */
- public void set(String fieldName, String fieldValue) {
- fields.put(fieldName, fieldValue);
- }
- /**
- * Get the value of a property of the EventRecord.
- * If the property with the specific key is not found,
- * null is returned.
- *
- * @param fieldName the name of the property to get.
- */
- public String get(String fieldName) {
- return fields.get(fieldName);
- }
- /**
- * Arrange the keys to provide a more readable printing order:
- * first goes the timestamp, then the hostname and then the type, followed
- * by all other keys found.
- *
- * @param keys The input ArrayList of keys to re-arrange.
- */
- public static void arrangeKeys(ArrayList<String> keys) {
- move(keys, "timestamp", 0);
- move(keys, "hostname", 1);
- move(keys, "type", 2);
- }
- private static void move(ArrayList<String> keys, String key, int position) {
- int cur = keys.indexOf(key);
- if (cur == -1)
- return;
- keys.set(cur, keys.get(position));
- keys.set(position, key);
- }
- /**
- * Check if the SerializedRecord is a valid one, i.e., whether
- * it represents meaningful metric values.
- *
- * @return true if the EventRecord is a valid one, false otherwise.
- */
- public boolean isValid() {
- return !("invalid".equalsIgnoreCase(fields.get("hostname")));
- }
-
- /**
- * Creates and returns a string reperssentation of the object
- *
- * @return a String representing the object
- */
- public String toString() {
- String retval = "";
- ArrayList<String> keys = new ArrayList<String>(fields.keySet());
- arrangeKeys(keys);
- for (int i = 0; i < keys.size(); i++) {
- String value = fields.get(keys.get(i));
- if (value == null)
- retval += keys.get(i) + ":tnulln";
- else
- retval += keys.get(i) + ":t" + value + "n";
- }
- return retval;
- }
- }