|
|
@@ -0,0 +1,268 @@
|
|
|
+package com.java110.core.cache;
|
|
|
+
|
|
|
+import com.java110.utils.util.Assert;
|
|
|
+import org.springframework.dao.PessimisticLockingFailureException;
|
|
|
+import org.springframework.data.redis.cache.RedisCacheWriter;
|
|
|
+import org.springframework.data.redis.connection.RedisConnection;
|
|
|
+import org.springframework.data.redis.connection.RedisConnectionFactory;
|
|
|
+import org.springframework.data.redis.connection.RedisStringCommands;
|
|
|
+import org.springframework.data.redis.core.types.Expiration;
|
|
|
+import org.springframework.lang.Nullable;
|
|
|
+
|
|
|
+import java.nio.charset.StandardCharsets;
|
|
|
+import java.time.Duration;
|
|
|
+import java.util.Collections;
|
|
|
+import java.util.Optional;
|
|
|
+import java.util.concurrent.TimeUnit;
|
|
|
+import java.util.function.Consumer;
|
|
|
+import java.util.function.Function;
|
|
|
+
|
|
|
+/**
|
|
|
+ * 自定义redis 缓存器
|
|
|
+ */
|
|
|
+public class Java110RedisCacheWriter implements RedisCacheWriter {
|
|
|
+
|
|
|
+
|
|
|
+ private final RedisConnectionFactory connectionFactory;
|
|
|
+
|
|
|
+ private final Duration sleepTime;
|
|
|
+
|
|
|
+ /**
|
|
|
+ * @param connectionFactory must not be {@literal null}.
|
|
|
+ */
|
|
|
+ Java110RedisCacheWriter(RedisConnectionFactory connectionFactory) {
|
|
|
+ this(connectionFactory, Duration.ZERO);
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * @param connectionFactory must not be {@literal null}.
|
|
|
+ * @param sleepTime sleep time between lock request attempts. Must not be {@literal null}. Use {@link Duration#ZERO}
|
|
|
+ * to disable locking.
|
|
|
+ */
|
|
|
+ Java110RedisCacheWriter(RedisConnectionFactory connectionFactory, Duration sleepTime) {
|
|
|
+
|
|
|
+ Assert.notNull(connectionFactory, "ConnectionFactory must not be null!");
|
|
|
+ Assert.notNull(sleepTime, "SleepTime must not be null!");
|
|
|
+
|
|
|
+ this.connectionFactory = connectionFactory;
|
|
|
+ this.sleepTime = sleepTime;
|
|
|
+ }
|
|
|
+
|
|
|
+ @Override
|
|
|
+ public void put(String name, byte[] key, byte[] value, @Nullable Duration ttl) {
|
|
|
+
|
|
|
+ Assert.notNull(name, "Name must not be null!");
|
|
|
+ Assert.notNull(key, "Key must not be null!");
|
|
|
+ Assert.notNull(value, "Value must not be null!");
|
|
|
+
|
|
|
+ execute(name, connection -> {
|
|
|
+
|
|
|
+ //当设置了过期时间,则修改取出
|
|
|
+ //@Cacheable(value="user-key#key_expire=1200",key = "#id",condition = "#id != 2")
|
|
|
+ //name 对应 value
|
|
|
+ //key 对应 value :: key
|
|
|
+
|
|
|
+ //判断name里面是否设置了过期时间,如果设置了则对key进行缓存,并设置过期时间
|
|
|
+ int index = name.lastIndexOf(Java110RedisConfig.REDIS_EXPIRE_TIME_KEY);
|
|
|
+ if (index > 0) {
|
|
|
+ //取出对应的时间 1200 index + 1是还有一个=号
|
|
|
+ String expireString = name.substring(index + 1 + Java110RedisConfig.REDIS_EXPIRE_TIME_KEY.length());
|
|
|
+ long expireTime = Long.parseLong(expireString);
|
|
|
+ connection.set(key, value, Expiration.from(expireTime, TimeUnit.SECONDS), RedisStringCommands.SetOption.upsert());
|
|
|
+ } else if (shouldExpireWithin(ttl)) {
|
|
|
+ connection.set(key, value, Expiration.from(ttl.toMillis(), TimeUnit.MILLISECONDS), RedisStringCommands.SetOption.upsert());
|
|
|
+ } else {
|
|
|
+ connection.set(key, value);
|
|
|
+ }
|
|
|
+ return "OK";
|
|
|
+ });
|
|
|
+ }
|
|
|
+ /*
|
|
|
+ * (non-Javadoc)
|
|
|
+ * @see org.springframework.data.redis.cache.RedisCacheWriter#get(java.lang.String, byte[])
|
|
|
+ */
|
|
|
+ @Override
|
|
|
+ public byte[] get(String name, byte[] key) {
|
|
|
+
|
|
|
+ org.springframework.util.Assert.notNull(name, "Name must not be null!");
|
|
|
+ org.springframework.util.Assert.notNull(key, "Key must not be null!");
|
|
|
+
|
|
|
+ return execute(name, connection -> connection.get(key));
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * (non-Javadoc)
|
|
|
+ * @see org.springframework.data.redis.cache.RedisCacheWriter#putIfAbsent(java.lang.String, byte[], byte[], java.time.Duration)
|
|
|
+ */
|
|
|
+ @Override
|
|
|
+ public byte[] putIfAbsent(String name, byte[] key, byte[] value, @Nullable Duration ttl) {
|
|
|
+
|
|
|
+ org.springframework.util.Assert.notNull(name, "Name must not be null!");
|
|
|
+ org.springframework.util.Assert.notNull(key, "Key must not be null!");
|
|
|
+ org.springframework.util.Assert.notNull(value, "Value must not be null!");
|
|
|
+
|
|
|
+ return execute(name, connection -> {
|
|
|
+
|
|
|
+ if (isLockingCacheWriter()) {
|
|
|
+ doLock(name, connection);
|
|
|
+ }
|
|
|
+
|
|
|
+ try {
|
|
|
+ if (connection.setNX(key, value)) {
|
|
|
+
|
|
|
+ if (shouldExpireWithin(ttl)) {
|
|
|
+ connection.pExpire(key, ttl.toMillis());
|
|
|
+ }
|
|
|
+ return null;
|
|
|
+ }
|
|
|
+
|
|
|
+ return connection.get(key);
|
|
|
+ } finally {
|
|
|
+
|
|
|
+ if (isLockingCacheWriter()) {
|
|
|
+ doUnlock(name, connection);
|
|
|
+ }
|
|
|
+ }
|
|
|
+ });
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * (non-Javadoc)
|
|
|
+ * @see org.springframework.data.redis.cache.RedisCacheWriter#remove(java.lang.String, byte[])
|
|
|
+ */
|
|
|
+ @Override
|
|
|
+ public void remove(String name, byte[] key) {
|
|
|
+
|
|
|
+ org.springframework.util.Assert.notNull(name, "Name must not be null!");
|
|
|
+ org.springframework.util.Assert.notNull(key, "Key must not be null!");
|
|
|
+
|
|
|
+ execute(name, connection -> connection.del(key));
|
|
|
+ }
|
|
|
+
|
|
|
+ /*
|
|
|
+ * (non-Javadoc)
|
|
|
+ * @see org.springframework.data.redis.cache.RedisCacheWriter#clean(java.lang.String, byte[])
|
|
|
+ */
|
|
|
+ @Override
|
|
|
+ public void clean(String name, byte[] pattern) {
|
|
|
+
|
|
|
+ Assert.notNull(name, "Name must not be null!");
|
|
|
+ Assert.notNull(pattern, "Pattern must not be null!");
|
|
|
+
|
|
|
+ execute(name, connection -> {
|
|
|
+
|
|
|
+ boolean wasLocked = false;
|
|
|
+
|
|
|
+ try {
|
|
|
+
|
|
|
+ if (isLockingCacheWriter()) {
|
|
|
+ doLock(name, connection);
|
|
|
+ wasLocked = true;
|
|
|
+ }
|
|
|
+
|
|
|
+ byte[][] keys = Optional.ofNullable(connection.keys(pattern)).orElse(Collections.emptySet())
|
|
|
+ .toArray(new byte[0][]);
|
|
|
+
|
|
|
+ if (keys.length > 0) {
|
|
|
+ connection.del(keys);
|
|
|
+ }
|
|
|
+ } finally {
|
|
|
+
|
|
|
+ if (wasLocked && isLockingCacheWriter()) {
|
|
|
+ doUnlock(name, connection);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ return "OK";
|
|
|
+ });
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Explicitly set a write lock on a cache.
|
|
|
+ *
|
|
|
+ * @param name the name of the cache to lock.
|
|
|
+ */
|
|
|
+ void lock(String name) {
|
|
|
+ execute(name, connection -> doLock(name, connection));
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * Explicitly remove a write lock from a cache.
|
|
|
+ *
|
|
|
+ * @param name the name of the cache to unlock.
|
|
|
+ */
|
|
|
+ void unlock(String name) {
|
|
|
+ executeLockFree(connection -> doUnlock(name, connection));
|
|
|
+ }
|
|
|
+
|
|
|
+ private Boolean doLock(String name, RedisConnection connection) {
|
|
|
+ return connection.setNX(createCacheLockKey(name), new byte[0]);
|
|
|
+ }
|
|
|
+
|
|
|
+ private Long doUnlock(String name, RedisConnection connection) {
|
|
|
+ return connection.del(createCacheLockKey(name));
|
|
|
+ }
|
|
|
+
|
|
|
+ boolean doCheckLock(String name, RedisConnection connection) {
|
|
|
+ return connection.exists(createCacheLockKey(name));
|
|
|
+ }
|
|
|
+
|
|
|
+ /**
|
|
|
+ * @return {@literal true} if {@link RedisCacheWriter} uses locks.
|
|
|
+ */
|
|
|
+ private boolean isLockingCacheWriter() {
|
|
|
+ return !sleepTime.isZero() && !sleepTime.isNegative();
|
|
|
+ }
|
|
|
+
|
|
|
+ private <T> T execute(String name, Function<RedisConnection, T> callback) {
|
|
|
+
|
|
|
+ RedisConnection connection = connectionFactory.getConnection();
|
|
|
+ try {
|
|
|
+
|
|
|
+ checkAndPotentiallyWaitUntilUnlocked(name, connection);
|
|
|
+ return callback.apply(connection);
|
|
|
+ } finally {
|
|
|
+ connection.close();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private void executeLockFree(Consumer<RedisConnection> callback) {
|
|
|
+
|
|
|
+ RedisConnection connection = connectionFactory.getConnection();
|
|
|
+
|
|
|
+ try {
|
|
|
+ callback.accept(connection);
|
|
|
+ } finally {
|
|
|
+ connection.close();
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private void checkAndPotentiallyWaitUntilUnlocked(String name, RedisConnection connection) {
|
|
|
+
|
|
|
+ if (!isLockingCacheWriter()) {
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ try {
|
|
|
+
|
|
|
+ while (doCheckLock(name, connection)) {
|
|
|
+ Thread.sleep(sleepTime.toMillis());
|
|
|
+ }
|
|
|
+ } catch (InterruptedException ex) {
|
|
|
+
|
|
|
+ // Re-interrupt current thread, to allow other participants to react.
|
|
|
+ Thread.currentThread().interrupt();
|
|
|
+
|
|
|
+ throw new PessimisticLockingFailureException(String.format("Interrupted while waiting to unlock cache %s", name),
|
|
|
+ ex);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ private static boolean shouldExpireWithin(@Nullable Duration ttl) {
|
|
|
+ return ttl != null && !ttl.isZero() && !ttl.isNegative();
|
|
|
+ }
|
|
|
+
|
|
|
+ private static byte[] createCacheLockKey(String name) {
|
|
|
+ return (name + "~lock").getBytes(StandardCharsets.UTF_8);
|
|
|
+ }
|
|
|
+}
|