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修复单例模式双检查错误

master
剑器近 2020-11-06 09:52:17 +08:00
parent 52fef50772
commit 514edd4796
4 changed files with 25 additions and 23 deletions
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11
src/main/java/io/github/yezhihao/protostar/schema/CollectionSchema.java
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@ -1,7 +1,7 @@
package io.github.yezhihao.protostar.schema;
import io.netty.buffer.ByteBuf;
import io.github.yezhihao.protostar.Schema;
import io.netty.buffer.ByteBuf;
import java.util.ArrayList;
import java.util.HashMap;
@ -10,13 +10,14 @@ import java.util.Map;
public class CollectionSchema<T> implements Schema<List<T>> {
private static volatile Map<Schema, CollectionSchema> cache = new HashMap<>();
private static volatile Map<Object, CollectionSchema> cache = new HashMap<>();
public static Schema<List> getInstance(Schema schema) {
CollectionSchema instance = cache.get(schema);
if (instance == null) {
Object key = schema;
CollectionSchema instance;
if ((instance = cache.get(key)) == null) {
synchronized (cache) {
if (instance == null) {
if ((instance = cache.get(key)) == null) {
instance = new CollectionSchema(schema);
cache.put(schema, instance);
log.debug("new CollectionSchema({})", schema);

16
src/main/java/io/github/yezhihao/protostar/schema/ConvertSchema.java
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@ -1,8 +1,8 @@
package io.github.yezhihao.protostar.schema;
import io.netty.buffer.ByteBuf;
import io.github.yezhihao.protostar.converter.Converter;
import io.github.yezhihao.protostar.Schema;
import io.github.yezhihao.protostar.converter.Converter;
import io.netty.buffer.ByteBuf;
import java.util.HashMap;
import java.util.Map;
@ -12,18 +12,18 @@ import java.util.Map;
*/
public class ConvertSchema<T> implements Schema<T> {
private static volatile Map<String, ConvertSchema> cache = new HashMap<>();
private static volatile Map<Object, ConvertSchema> cache = new HashMap<>();
public static Schema getInstance(Class<? extends Converter> clazz) {
String name = clazz.getName();
ConvertSchema instance = cache.get(name);
if (instance == null) {
String key = clazz.getName();
ConvertSchema instance;
if ((instance = cache.get(key)) == null) {
synchronized (cache) {
if (instance == null) {
if ((instance = cache.get(key)) == null) {
try {
Converter converter = clazz.newInstance();
instance = new ConvertSchema(converter);
cache.put(name, instance);
cache.put(key, instance);
log.debug("new ConvertSchema({})", clazz);
} catch (Exception e) {
throw new RuntimeException(e);

11
src/main/java/io/github/yezhihao/protostar/schema/ObjectSchema.java
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@ -1,20 +1,21 @@
package io.github.yezhihao.protostar.schema;
import io.netty.buffer.ByteBuf;
import io.github.yezhihao.protostar.Schema;
import io.netty.buffer.ByteBuf;
import java.util.HashMap;
import java.util.Map;
public class ObjectSchema<T> implements Schema<T> {
private static volatile Map<Schema, ObjectSchema> cache = new HashMap<>();
private static volatile Map<Object, ObjectSchema> cache = new HashMap<>();
public static Schema getInstance(Schema schema) {
ObjectSchema instance = cache.get(schema);
if (instance == null) {
Object key = schema;
ObjectSchema instance;
if ((instance = cache.get(key)) == null) {
synchronized (cache) {
if (instance == null) {
if ((instance = cache.get(key)) == null) {
instance = new ObjectSchema(schema);
cache.put(schema, instance);
log.debug("new ObjectSchema({})", schema);

10
src/main/java/io/github/yezhihao/protostar/schema/StringSchema.java
View File

@ -1,8 +1,8 @@
package io.github.yezhihao.protostar.schema;
import io.netty.buffer.ByteBuf;
import io.github.yezhihao.protostar.Schema;
import io.github.yezhihao.protostar.util.Bcd;
import io.netty.buffer.ByteBuf;
import java.nio.charset.Charset;
import java.util.Arrays;
@ -12,15 +12,15 @@ import java.util.Map;
public class StringSchema {
public static class Chars implements Schema<String> {
private static volatile Map<String, Chars> cache = new HashMap<>();
private static volatile Map<Object, Chars> cache = new HashMap<>();
public static Schema<String> getInstance(byte pad, String charset) {
charset = charset.toLowerCase();
String key = new StringBuilder(10).append((char) pad).append('/').append(charset).toString();
Chars instance = cache.get(key);
if (instance == null) {
Chars instance;
if ((instance = cache.get(key)) == null) {
synchronized (cache) {
if (instance == null) {
if ((instance = cache.get(key)) == null) {
instance = new Chars(pad, charset);
cache.put(key, instance);
log.debug("new StringSchema({},{})", pad, charset);