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HADOOP-8172. Configuration no longer sets all keys in a deprecated key list. (Anupam Seth via bobby) 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1332821 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Robert Joseph Evans 2012-05-01 21:00:52 +00:00
parent 934f466bab
commit 7d1b804d3a
4 changed files with 164 additions and 34 deletions
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3
hadoop-common-project/hadoop-common/CHANGES.txt
View File

@ -447,6 +447,9 @@ Release 2.0.0 - UNRELEASED
HADOOP-8317. Update maven-assembly-plugin to 2.3 - fix build on FreeBSD
(Radim Kolar via bobby)
HADOOP-8172. Configuration no longer sets all keys in a deprecated key
list. (Anupam Seth via bobby)
Release 0.23.3 - UNRELEASED
INCOMPATIBLE CHANGES

141
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/conf/Configuration.java
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@ -33,6 +33,7 @@ import java.io.Writer;
import java.net.InetSocketAddress;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Enumeration;
@ -269,10 +270,18 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* This is to be used only by the developers in order to add deprecation of
* keys, and attempts to call this method after loading resources once,
* would lead to <tt>UnsupportedOperationException</tt>
*
* If a key is deprecated in favor of multiple keys, they are all treated as
* aliases of each other, and setting any one of them resets all the others
* to the new value.
*
* @param key
* @param newKeys
* @param customMessage
* @deprecated use {@link addDeprecation(String key, String newKey,
String customMessage)} instead
*/
@Deprecated
public synchronized static void addDeprecation(String key, String[] newKeys,
String customMessage) {
if (key == null || key.length() == 0 ||
@ -288,6 +297,22 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
}
}
}
/**
* Adds the deprecated key to the deprecation map.
* It does not override any existing entries in the deprecation map.
* This is to be used only by the developers in order to add deprecation of
* keys, and attempts to call this method after loading resources once,
* would lead to <tt>UnsupportedOperationException</tt>
*
* @param key
* @param newKey
* @param customMessage
*/
public synchronized static void addDeprecation(String key, String newKey,
String customMessage) {
addDeprecation(key, new String[] {newKey}, customMessage);
}
/**
* Adds the deprecated key to the deprecation map when no custom message
@ -297,13 +322,34 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* keys, and attempts to call this method after loading resources once,
* would lead to <tt>UnsupportedOperationException</tt>
*
* If a key is deprecated in favor of multiple keys, they are all treated as
* aliases of each other, and setting any one of them resets all the others
* to the new value.
*
* @param key Key that is to be deprecated
* @param newKeys list of keys that take up the values of deprecated key
* @deprecated use {@link addDeprecation(String key, String newKey)} instead
*/
@Deprecated
public synchronized static void addDeprecation(String key, String[] newKeys) {
addDeprecation(key, newKeys, null);
}
/**
* Adds the deprecated key to the deprecation map when no custom message
* is provided.
* It does not override any existing entries in the deprecation map.
* This is to be used only by the developers in order to add deprecation of
* keys, and attempts to call this method after loading resources once,
* would lead to <tt>UnsupportedOperationException</tt>
*
* @param key Key that is to be deprecated
* @param newKey key that takes up the value of deprecated key
*/
public synchronized static void addDeprecation(String key, String newKey) {
addDeprecation(key, new String[] {newKey}, null);
}
/**
* checks whether the given <code>key</code> is deprecated.
*
@ -322,16 +368,26 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* @param name property name.
* @return alternate name.
*/
private String getAlternateName(String name) {
String altName;
private String[] getAlternateNames(String name) {
String oldName, altNames[] = null;
DeprecatedKeyInfo keyInfo = deprecatedKeyMap.get(name);
if (keyInfo != null) {
altName = (keyInfo.newKeys.length > 0) ? keyInfo.newKeys[0] : null;
if (keyInfo == null) {
altNames = (reverseDeprecatedKeyMap.get(name) != null ) ?
new String [] {reverseDeprecatedKeyMap.get(name)} : null;
if(altNames != null && altNames.length > 0) {
//To help look for other new configs for this deprecated config
keyInfo = deprecatedKeyMap.get(altNames[0]);
}
}
if(keyInfo != null && keyInfo.newKeys.length > 0) {
List<String> list = new ArrayList<String>();
if(altNames != null) {
list.addAll(Arrays.asList(altNames));
}
list.addAll(Arrays.asList(keyInfo.newKeys));
altNames = list.toArray(new String[list.size()]);
}
else {
altName = reverseDeprecatedKeyMap.get(name);
}
return altName;
return altNames;
}
/**
@ -346,24 +402,29 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* @return the first property in the list of properties mapping
* the <code>name</code> or the <code>name</code> itself.
*/
private String handleDeprecation(String name) {
if (isDeprecated(name)) {
private String[] handleDeprecation(String name) {
ArrayList<String > names = new ArrayList<String>();
if (isDeprecated(name)) {
DeprecatedKeyInfo keyInfo = deprecatedKeyMap.get(name);
warnOnceIfDeprecated(name);
for (String newKey : keyInfo.newKeys) {
if(newKey != null) {
name = newKey;
break;
names.add(newKey);
}
}
}
String deprecatedKey = reverseDeprecatedKeyMap.get(name);
if (deprecatedKey != null && !getOverlay().containsKey(name) &&
getOverlay().containsKey(deprecatedKey)) {
getProps().setProperty(name, getOverlay().getProperty(deprecatedKey));
getOverlay().setProperty(name, getOverlay().getProperty(deprecatedKey));
if(names.size() == 0) {
names.add(name);
}
return name;
for(String n : names) {
String deprecatedKey = reverseDeprecatedKeyMap.get(n);
if (deprecatedKey != null && !getOverlay().containsKey(n) &&
getOverlay().containsKey(deprecatedKey)) {
getProps().setProperty(n, getOverlay().getProperty(deprecatedKey));
getOverlay().setProperty(n, getOverlay().getProperty(deprecatedKey));
}
}
return names.toArray(new String[names.size()]);
}
private void handleDeprecation() {
@ -595,8 +656,12 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* or null if no such property exists.
*/
public String get(String name) {
name = handleDeprecation(name);
return substituteVars(getProps().getProperty(name));
String[] names = handleDeprecation(name);
String result = null;
for(String n : names) {
result = substituteVars(getProps().getProperty(n));
}
return result;
}
/**
@ -633,8 +698,12 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* its replacing property and null if no such property exists.
*/
public String getRaw(String name) {
name = handleDeprecation(name);
return getProps().getProperty(name);
String[] names = handleDeprecation(name);
String result = null;
for(String n : names) {
result = getProps().getProperty(n);
}
return result;
}
/**
@ -652,10 +721,12 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
getOverlay().setProperty(name, value);
getProps().setProperty(name, value);
updatingResource.put(name, UNKNOWN_RESOURCE);
String altName = getAlternateName(name);
if (altName != null) {
getOverlay().setProperty(altName, value);
getProps().setProperty(altName, value);
String[] altNames = getAlternateNames(name);
if (altNames != null && altNames.length > 0) {
for(String altName : altNames) {
getOverlay().setProperty(altName, value);
getProps().setProperty(altName, value);
}
}
warnOnceIfDeprecated(name);
}
@ -671,12 +742,14 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* Unset a previously set property.
*/
public synchronized void unset(String name) {
String altName = getAlternateName(name);
String[] altNames = getAlternateNames(name);
getOverlay().remove(name);
getProps().remove(name);
if (altName !=null) {
getOverlay().remove(altName);
getProps().remove(altName);
if (altNames !=null && altNames.length > 0) {
for(String altName : altNames) {
getOverlay().remove(altName);
getProps().remove(altName);
}
}
}
@ -711,8 +784,12 @@ public class Configuration implements Iterable<Map.Entry<String,String>>,
* doesn't exist.
*/
public String get(String name, String defaultValue) {
name = handleDeprecation(name);
return substituteVars(getProps().getProperty(name, defaultValue));
String[] names = handleDeprecation(name);
String result = null;
for(String n : names) {
result = substituteVars(getProps().getProperty(n, defaultValue));
}
return result;
}
/**

4
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestConfigurationDeprecation.java
View File

@ -164,7 +164,7 @@ public class TestConfigurationDeprecation {
conf.set("Y", "y");
conf.set("Z", "z");
// get old key
assertEquals("y", conf.get("X"));
assertEquals("z", conf.get("X"));
}
/**
@ -305,7 +305,7 @@ public class TestConfigurationDeprecation {
assertTrue("deprecated Key not found", dKFound);
assertTrue("new Key not found", nKFound);
}
@Test
public void testUnsetWithDeprecatedKeys() {
Configuration conf = new Configuration();

50
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/conf/TestDeprecatedKeys.java
View File

@ -18,10 +18,15 @@
package org.apache.hadoop.conf;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.util.Map;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.junit.Test;
import junit.framework.TestCase;
@ -53,4 +58,49 @@ public class TestDeprecatedKeys extends TestCase {
assertTrue(fileContents.contains("old.config.yet.to.be.deprecated"));
assertTrue(fileContents.contains("new.conf.to.replace.deprecated.conf"));
}
@Test
public void testIteratorWithDeprecatedKeysMappedToMultipleNewKeys() {
Configuration conf = new Configuration();
Configuration.addDeprecation("dK", new String[]{"nK1", "nK2"});
conf.set("k", "v");
conf.set("dK", "V");
assertEquals("V", conf.get("dK"));
assertEquals("V", conf.get("nK1"));
assertEquals("V", conf.get("nK2"));
conf.set("nK1", "VV");
assertEquals("VV", conf.get("dK"));
assertEquals("VV", conf.get("nK1"));
assertEquals("VV", conf.get("nK2"));
conf.set("nK2", "VVV");
assertEquals("VVV", conf.get("dK"));
assertEquals("VVV", conf.get("nK2"));
assertEquals("VVV", conf.get("nK1"));
boolean kFound = false;
boolean dKFound = false;
boolean nK1Found = false;
boolean nK2Found = false;
for (Map.Entry<String, String> entry : conf) {
if (entry.getKey().equals("k")) {
assertEquals("v", entry.getValue());
kFound = true;
}
if (entry.getKey().equals("dK")) {
assertEquals("VVV", entry.getValue());
dKFound = true;
}
if (entry.getKey().equals("nK1")) {
assertEquals("VVV", entry.getValue());
nK1Found = true;
}
if (entry.getKey().equals("nK2")) {
assertEquals("VVV", entry.getValue());
nK2Found = true;
}
}
assertTrue("regular Key not found", kFound);
assertTrue("deprecated Key not found", dKFound);
assertTrue("new Key 1 not found", nK1Found);
assertTrue("new Key 2 not found", nK2Found);
}
}