package redis.clients.jedis;
import static redis.clients.jedis.Protocol.Keyword.MESSAGE;
import static redis.clients.jedis.Protocol.Keyword.PMESSAGE;
import static redis.clients.jedis.Protocol.Keyword.PSUBSCRIBE;
import static redis.clients.jedis.Protocol.Keyword.PUNSUBSCRIBE;
import static redis.clients.jedis.Protocol.Keyword.SUBSCRIBE;
import static redis.clients.jedis.Protocol.Keyword.UNSUBSCRIBE;
import java.util.Arrays;
import java.util.List;
import redis.clients.jedis.exceptions.JedisConnectionException;
import redis.clients.jedis.exceptions.JedisException;
import redis.clients.util.SafeEncoder;
public abstract class JedisPubSub {
private int subscribedChannels = 0;
private volatile Client client;
public abstract void onMessage(String channel, String message);
public abstract void onPMessage(String pattern, String channel,
String message);
public abstract void onSubscribe(String channel, int subscribedChannels);
public abstract void onUnsubscribe(String channel, int subscribedChannels);
public abstract void onPUnsubscribe(String pattern, int subscribedChannels);
public abstract void onPSubscribe(String pattern, int subscribedChannels);
public void unsubscribe() {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub was not subscribed to a Jedis instance.");
}
client.unsubscribe();
client.flush();
}
public void unsubscribe(String... channels) {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub is not subscribed to a Jedis instance.");
}
client.unsubscribe(channels);
client.flush();
}
public void subscribe(String... channels) {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub is not subscribed to a Jedis instance.");
}
client.subscribe(channels);
client.flush();
}
public void psubscribe(String... patterns) {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub is not subscribed to a Jedis instance.");
}
client.psubscribe(patterns);
client.flush();
}
public void punsubscribe() {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub is not subscribed to a Jedis instance.");
}
client.punsubscribe();
client.flush();
}
public void punsubscribe(String... patterns) {
if (client == null) {
throw new JedisConnectionException(
"JedisPubSub is not subscribed to a Jedis instance.");
}
client.punsubscribe(patterns);
client.flush();
}
public boolean isSubscribed() {
return subscribedChannels > 0;
}
public void proceedWithPatterns(Client client, String... patterns) {
this.client = client;
client.psubscribe(patterns);
client.flush();
process(client);
}
public void proceed(Client client, String... channels) {
this.client = client;
client.subscribe(channels);
client.flush();
process(client);
}
private void process(Client client) {
do {
List<Object> reply = client.getRawObjectMultiBulkReply();
final Object firstObj = reply.get(0);
if (!(firstObj instanceof byte[])) {
throw new JedisException("Unknown message type: " + firstObj);
}
final byte[] resp = (byte[]) firstObj;
if (Arrays.equals(SUBSCRIBE.raw, resp)) {
subscribedChannels = ((Long) reply.get(2)).intValue();
final byte[] bchannel = (byte[]) reply.get(1);
final String strchannel = (bchannel == null) ? null
: SafeEncoder.encode(bchannel);
onSubscribe(strchannel, subscribedChannels);
} else if (Arrays.equals(UNSUBSCRIBE.raw, resp)) {
subscribedChannels = ((Long) reply.get(2)).intValue();
final byte[] bchannel = (byte[]) reply.get(1);
final String strchannel = (bchannel == null) ? null
: SafeEncoder.encode(bchannel);
onUnsubscribe(strchannel, subscribedChannels);
} else if (Arrays.equals(MESSAGE.raw, resp)) {
final byte[] bchannel = (byte[]) reply.get(1);
final byte[] bmesg = (byte[]) reply.get(2);
final String strchannel = (bchannel == null) ? null
: SafeEncoder.encode(bchannel);
final String strmesg = (bmesg == null) ? null : SafeEncoder
.encode(bmesg);
onMessage(strchannel, strmesg);
} else if (Arrays.equals(PMESSAGE.raw, resp)) {
final byte[] bpattern = (byte[]) reply.get(1);
final byte[] bchannel = (byte[]) reply.get(2);
final byte[] bmesg = (byte[]) reply.get(3);
final String strpattern = (bpattern == null) ? null
: SafeEncoder.encode(bpattern);
final String strchannel = (bchannel == null) ? null
: SafeEncoder.encode(bchannel);
final String strmesg = (bmesg == null) ? null : SafeEncoder
.encode(bmesg);
onPMessage(strpattern, strchannel, strmesg);
} else if (Arrays.equals(PSUBSCRIBE.raw, resp)) {
subscribedChannels = ((Long) reply.get(2)).intValue();
final byte[] bpattern = (byte[]) reply.get(1);
final String strpattern = (bpattern == null) ? null
: SafeEncoder.encode(bpattern);
onPSubscribe(strpattern, subscribedChannels);
} else if (Arrays.equals(PUNSUBSCRIBE.raw, resp)) {
subscribedChannels = ((Long) reply.get(2)).intValue();
final byte[] bpattern = (byte[]) reply.get(1);
final String strpattern = (bpattern == null) ? null
: SafeEncoder.encode(bpattern);
onPUnsubscribe(strpattern, subscribedChannels);
} else {
throw new JedisException("Unknown message type: " + firstObj);
}
} while (isSubscribed());
/* Invalidate instance since this thread is no longer listening */
this.client = null;
}
public int getSubscribedChannels() {
return subscribedChannels;
}
}