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replace Pair<String, ByteBuffer> with NamedKey

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This commit is contained in:
xvrl 2013-01-18 10:00:06 -08:00
parent 9032ef521b
commit a70ae15585
7 changed files with 115 additions and 85 deletions
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33
client/src/main/java/com/metamx/druid/client/CachingClusteredClient.java
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@ -21,6 +21,7 @@ package com.metamx.druid.client;
import com.google.common.base.Function;
import com.google.common.base.Predicate;
import com.google.common.base.Predicates;
import com.google.common.base.Supplier;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMap;
@ -133,7 +134,7 @@ public class CachingClusteredClient<T> implements QueryRunner<T>
return Sequences.empty();
}
Map<Pair<ServerSelector, SegmentDescriptor>, Pair<String, ByteBuffer>> segments = Maps.newLinkedHashMap();
Map<Pair<ServerSelector, SegmentDescriptor>, CacheBroker.NamedKey> segments = Maps.newLinkedHashMap();
final byte[] queryCacheKey = (strategy != null) ? strategy.computeCacheKey(query) : null;
@ -156,21 +157,13 @@ public class CachingClusteredClient<T> implements QueryRunner<T>
}
}
Map<Pair<String, ByteBuffer>, byte[]> cachedValues = cacheBroker.getBulk(
Iterables.filter(segments.values(), new Predicate<Pair<String, ByteBuffer>>()
{
@Override
public boolean apply(
@Nullable Pair<String, ByteBuffer> input
)
{
return input != null;
}
})
Map<CacheBroker.NamedKey, byte[]> cachedValues = cacheBroker.getBulk(
Iterables.filter(segments.values(), Predicates.notNull())
);
for(Pair<ServerSelector, SegmentDescriptor> segment : segments.keySet()) {
Pair<String, ByteBuffer> segmentCacheKey = segments.get(segment);
for(Map.Entry<Pair<ServerSelector, SegmentDescriptor>, CacheBroker.NamedKey> entry : segments.entrySet()) {
Pair<ServerSelector, SegmentDescriptor> segment = entry.getKey();
CacheBroker.NamedKey segmentCacheKey = entry.getValue();
final ServerSelector selector = segment.lhs;
final SegmentDescriptor descriptor = segment.rhs;
@ -335,19 +328,19 @@ public class CachingClusteredClient<T> implements QueryRunner<T>
);
}
private Pair<String, ByteBuffer> computeSegmentCacheKey(String segmentIdentifier, SegmentDescriptor descriptor, byte[] queryCacheKey)
private CacheBroker.NamedKey computeSegmentCacheKey(String segmentIdentifier, SegmentDescriptor descriptor, byte[] queryCacheKey)
{
final Interval segmentQueryInterval = descriptor.getInterval();
final byte[] versionBytes = descriptor.getVersion().getBytes();
return Pair.of(
return new CacheBroker.NamedKey(
segmentIdentifier, ByteBuffer
.allocate(16 + versionBytes.length + 4 + queryCacheKey.length)
.putLong(segmentQueryInterval.getStartMillis())
.putLong(segmentQueryInterval.getEndMillis())
.put(versionBytes)
.putInt(descriptor.getPartitionNumber())
.put(queryCacheKey)
.put(queryCacheKey).array()
);
}
@ -355,9 +348,9 @@ public class CachingClusteredClient<T> implements QueryRunner<T>
{
private final CacheBroker cache;
private final ObjectMapper mapper;
private final Pair<String, ByteBuffer> key;
private final CacheBroker.NamedKey key;
public CachePopulator(CacheBroker cache, ObjectMapper mapper, Pair<String, ByteBuffer> key)
public CachePopulator(CacheBroker cache, ObjectMapper mapper, CacheBroker.NamedKey key)
{
this.cache = cache;
this.mapper = mapper;
@ -382,7 +375,7 @@ public class CachingClusteredClient<T> implements QueryRunner<T>
offset += array.length;
}
cache.put(key.lhs, key.rhs.array(), valueBytes);
cache.put(key, valueBytes);
}
catch (IOException e) {
throw Throwables.propagate(e);

55
client/src/main/java/com/metamx/druid/client/cache/CacheBroker.java vendored
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@ -19,20 +19,63 @@
package com.metamx.druid.client.cache;
import com.metamx.common.Pair;
import com.google.common.base.Preconditions;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.Map;
/**
*/
public interface CacheBroker
{
public byte[] get(String identifier, byte[] key);
public void put(String identifier, byte[] key, byte[] value);
public Map<Pair<String, ByteBuffer>, byte[]> getBulk(Iterable<Pair<String, ByteBuffer>> identifierKeyPairs);
public byte[] get(NamedKey key);
public void put(NamedKey key, byte[] value);
public Map<NamedKey, byte[]> getBulk(Iterable<NamedKey> keys);
public void close(String identifier);
public void close(String namespace);
public CacheStats getStats();
public class NamedKey
{
final public String namespace;
final public byte[] key;
public NamedKey(String namespace, byte[] key) {
Preconditions.checkArgument(namespace != null, "namespace must not be null");
Preconditions.checkArgument(key != null, "key must not be null");
this.namespace = namespace;
this.key = key;
}
@Override
public boolean equals(Object o)
{
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
NamedKey namedKey = (NamedKey) o;
if (!namespace.equals(namedKey.namespace)) {
return false;
}
if (!Arrays.equals(key, namedKey.key)) {
return false;
}
return true;
}
@Override
public int hashCode()
{
int result = namespace.hashCode();
result = 31 * result + Arrays.hashCode(key);
return result;
}
}
}

24
client/src/main/java/com/metamx/druid/client/cache/MapCacheBroker.java vendored
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@ -94,32 +94,32 @@ public class MapCacheBroker implements CacheBroker
}
@Override
public byte[] get(String identifier, byte[] key)
public byte[] get(NamedKey key)
{
return provideCache(identifier).get(key);
return provideCache(key.namespace).get(key.key);
}
@Override
public void put(String identifier, byte[] key, byte[] value)
public void put(NamedKey key, byte[] value)
{
provideCache(identifier).put(key, value);
provideCache(key.namespace).put(key.key, value);
}
@Override
public Map<Pair<String, ByteBuffer>, byte[]> getBulk(Iterable<Pair<String, ByteBuffer>> identifierKeyPairs)
public Map<NamedKey, byte[]> getBulk(Iterable<NamedKey> keys)
{
Map<Pair<String, ByteBuffer>, byte[]> retVal = Maps.newHashMap();
Map<NamedKey, byte[]> retVal = Maps.newHashMap();
for(Pair<String, ByteBuffer> e : identifierKeyPairs) {
retVal.put(e, provideCache(e.lhs).get(e.rhs.array()));
for(NamedKey key : keys) {
retVal.put(key, provideCache(key.namespace).get(key.key));
}
return retVal;
}
@Override
public void close(String identifier)
public void close(String namespace)
{
provideCache(identifier).close();
provideCache(namespace).close();
}
private Cache provideCache(final String identifier)
@ -148,7 +148,7 @@ public class MapCacheBroker implements CacheBroker
}
return retVal;
}
throw new ISE("Cache for identifier[%s] is closed.", identifier);
throw new ISE("Cache for namespace[%s] is closed.", identifier);
}
@Override
@ -160,7 +160,7 @@ public class MapCacheBroker implements CacheBroker
return;
}
}
throw new ISE("Cache for identifier[%s] is closed.", identifier);
throw new ISE("Cache for namespace[%s] is closed.", identifier);
}
@Override

32
client/src/main/java/com/metamx/druid/client/cache/MemcachedCacheBroker.java vendored
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@ -21,9 +21,7 @@ package com.metamx.druid.client.cache;
import com.google.common.base.Function;
import com.google.common.base.Throwables;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import com.metamx.common.Pair;
import net.iharder.base64.Base64;
import net.spy.memcached.AddrUtil;
import net.spy.memcached.ConnectionFactoryBuilder;
@ -36,8 +34,6 @@ import net.spy.memcached.transcoders.SerializingTranscoder;
import javax.annotation.Nullable;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Collection;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
@ -103,9 +99,9 @@ public class MemcachedCacheBroker implements CacheBroker
}
@Override
public byte[] get(String identifier, byte[] key)
public byte[] get(NamedKey key)
{
Future<Object> future = client.asyncGet(computeKey(identifier, key));
Future<Object> future = client.asyncGet(computeKeyString(key));
try {
byte[] bytes = (byte[]) future.get(timeout, TimeUnit.MILLISECONDS);
if(bytes != null) {
@ -131,24 +127,24 @@ public class MemcachedCacheBroker implements CacheBroker
}
@Override
public void put(String identifier, byte[] key, byte[] value)
public void put(NamedKey key, byte[] value)
{
client.set(computeKey(identifier, key), expiration, value);
client.set(computeKeyString(key), expiration, value);
}
@Override
public Map<Pair<String, ByteBuffer>, byte[]> getBulk(Iterable<Pair<String, ByteBuffer>> identifierKeyPairs)
public Map<NamedKey, byte[]> getBulk(Iterable<NamedKey> keys)
{
Map<String, Pair<String, ByteBuffer>> keyLookup = Maps.uniqueIndex(
identifierKeyPairs,
new Function<Pair<String, ByteBuffer>, String>()
Map<String, NamedKey> keyLookup = Maps.uniqueIndex(
keys,
new Function<NamedKey, String>()
{
@Override
public String apply(
@Nullable Pair<String, ByteBuffer> input
@Nullable NamedKey input
)
{
return computeKey(input.lhs, input.rhs.array());
return computeKeyString(input);
}
}
);
@ -165,7 +161,7 @@ public class MemcachedCacheBroker implements CacheBroker
missCount.addAndGet(keyLookup.size() - some.size());
hitCount.addAndGet(some.size());
Map<Pair<String, ByteBuffer>, byte[]> results = Maps.newHashMap();
Map<NamedKey, byte[]> results = Maps.newHashMap();
for(Map.Entry<String, Object> entry : some.entrySet()) {
results.put(
keyLookup.get(entry.getKey()),
@ -185,12 +181,12 @@ public class MemcachedCacheBroker implements CacheBroker
}
@Override
public void close(String identifier)
public void close(String namespace)
{
// no resources to cleanup
}
private String computeKey(String identifier, byte[] key) {
return identifier + ":" + Base64.encodeBytes(key, Base64.DONT_BREAK_LINES);
private static String computeKeyString(NamedKey key) {
return key.namespace + ":" + Base64.encodeBytes(key.key, Base64.DONT_BREAK_LINES);
}
}

16
client/src/test/java/com/metamx/druid/client/cache/MapCacheBrokerTest.java vendored
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@ -43,12 +43,12 @@ public class MapCacheBrokerTest
@Test
public void testSanity() throws Exception
{
Assert.assertNull(cache.get("a", HI));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HI)));
Assert.assertEquals(0, baseMap.size());
put(cache, "a", HI, 1);
Assert.assertEquals(1, baseMap.size());
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("the", HI));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("the", HI)));
put(cache, "the", HI, 2);
Assert.assertEquals(2, baseMap.size());
@ -58,26 +58,26 @@ public class MapCacheBrokerTest
put(cache, "the", HO, 10);
Assert.assertEquals(3, baseMap.size());
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("a", HO));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HO)));
Assert.assertEquals(2, get(cache, "the", HI));
Assert.assertEquals(10, get(cache, "the", HO));
cache.close("the");
Assert.assertEquals(1, baseMap.size());
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("a", HO));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HO)));
cache.close("a");
Assert.assertEquals(0, baseMap.size());
}
public void put(CacheBroker cache, String identifier, byte[] key, Integer value)
public void put(CacheBroker cache, String namespace, byte[] key, Integer value)
{
cache.put(identifier, key, Ints.toByteArray(value));
cache.put(new CacheBroker.NamedKey(namespace, key), Ints.toByteArray(value));
}
public int get(CacheBroker cache, String identifier, byte[] key)
public int get(CacheBroker cache, String namespace, byte[] key)
{
return Ints.fromByteArray(cache.get(identifier, key));
return Ints.fromByteArray(cache.get(new CacheBroker.NamedKey(namespace, key)));
}
}

16
client/src/test/java/com/metamx/druid/client/cache/MemcachedCacheBrokerBenchmark.java vendored
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@ -4,7 +4,6 @@ import com.google.caliper.Param;
import com.google.caliper.Runner;
import com.google.caliper.SimpleBenchmark;
import com.google.common.collect.Lists;
import com.metamx.common.Pair;
import net.spy.memcached.AddrUtil;
import net.spy.memcached.ConnectionFactoryBuilder;
import net.spy.memcached.DefaultHashAlgorithm;
@ -13,7 +12,6 @@ import net.spy.memcached.MemcachedClient;
import net.spy.memcached.MemcachedClientIF;
import net.spy.memcached.transcoders.SerializingTranscoder;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.Map;
import java.util.Random;
@ -22,7 +20,7 @@ import java.util.concurrent.TimeUnit;
public class MemcachedCacheBrokerBenchmark extends SimpleBenchmark
{
private static final String BASE_KEY = "test_2012-11-26T00:00:00.000Z_2012-11-27T00:00:00.000Z_2012-11-27T04:11:25.979Z_";
public static final String IDENTIFIER = "default";
public static final String NAMESPACE = "default";
private MemcachedCacheBroker cache;
private MemcachedClientIF client;
@ -77,7 +75,7 @@ public class MemcachedCacheBrokerBenchmark extends SimpleBenchmark
for(int i = 0; i < reps; ++i) {
for(int k = 0; k < objectCount; ++k) {
String key = BASE_KEY + k;
cache.put(IDENTIFIER, key.getBytes(), randBytes);
cache.put(new CacheBroker.NamedKey(NAMESPACE, key.getBytes()), randBytes);
}
// make sure the write queue is empty
client.waitForQueues(1, TimeUnit.HOURS);
@ -90,7 +88,7 @@ public class MemcachedCacheBrokerBenchmark extends SimpleBenchmark
for (int i = 0; i < reps; i++) {
for(int k = 0; k < objectCount; ++k) {
String key = BASE_KEY + k;
bytes = cache.get(IDENTIFIER, key.getBytes());
bytes = cache.get(new CacheBroker.NamedKey(NAMESPACE, key.getBytes()));
count += bytes.length;
}
}
@ -100,13 +98,13 @@ public class MemcachedCacheBrokerBenchmark extends SimpleBenchmark
public long timeBulkGetObjects(int reps) {
long count = 0;
for (int i = 0; i < reps; i++) {
List<Pair<String, ByteBuffer>> keys = Lists.newArrayList();
List<CacheBroker.NamedKey> keys = Lists.newArrayList();
for(int k = 0; k < objectCount; ++k) {
String key = BASE_KEY + k;
keys.add(Pair.of(IDENTIFIER, ByteBuffer.wrap(key.getBytes())));
keys.add(new CacheBroker.NamedKey(NAMESPACE, key.getBytes()));
}
Map<Pair<String, ByteBuffer>, byte[]> results = cache.getBulk(keys);
for(Pair<String, ByteBuffer> key : keys) {
Map<CacheBroker.NamedKey, byte[]> results = cache.getBulk(keys);
for(CacheBroker.NamedKey key : keys) {
byte[] bytes = results.get(key);
count += bytes.length;
}

24
client/src/test/java/com/metamx/druid/client/cache/MemcachedCacheBrokerTest.java vendored
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@ -68,10 +68,10 @@ public class MemcachedCacheBrokerTest
@Test
public void testSanity() throws Exception
{
Assert.assertNull(cache.get("a", HI));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HI)));
put(cache, "a", HI, 1);
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("the", HI));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("the", HI)));
put(cache, "the", HI, 2);
Assert.assertEquals(1, get(cache, "a", HI));
@ -79,13 +79,13 @@ public class MemcachedCacheBrokerTest
put(cache, "the", HO, 10);
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("a", HO));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HO)));
Assert.assertEquals(2, get(cache, "the", HI));
Assert.assertEquals(10, get(cache, "the", HO));
cache.close("the");
Assert.assertEquals(1, get(cache, "a", HI));
Assert.assertNull(cache.get("a", HO));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("a", HO)));
cache.close("a");
}
@ -93,15 +93,15 @@ public class MemcachedCacheBrokerTest
@Test
public void testGetBulk() throws Exception
{
Assert.assertNull(cache.get("the", HI));
Assert.assertNull(cache.get(new CacheBroker.NamedKey("the", HI)));
put(cache, "the", HI, 2);
put(cache, "the", HO, 10);
Pair<String, ByteBuffer> key1 = Pair.of("the", ByteBuffer.wrap(HI));
Pair<String, ByteBuffer> key2 = Pair.of("the", ByteBuffer.wrap(HO));
CacheBroker.NamedKey key1 = new CacheBroker.NamedKey("the", HI);
CacheBroker.NamedKey key2 = new CacheBroker.NamedKey("the", HO);
Map<Pair<String, ByteBuffer>, byte[]> result = cache.getBulk(
Map<CacheBroker.NamedKey, byte[]> result = cache.getBulk(
Lists.newArrayList(
key1,
key2
@ -112,14 +112,14 @@ public class MemcachedCacheBrokerTest
Assert.assertEquals(10, Ints.fromByteArray(result.get(key2)));
}
public void put(CacheBroker cache, String identifier, byte[] key, Integer value)
public void put(CacheBroker cache, String namespace, byte[] key, Integer value)
{
cache.put(identifier, key, Ints.toByteArray(value));
cache.put(new CacheBroker.NamedKey(namespace, key), Ints.toByteArray(value));
}
public int get(CacheBroker cache, String identifier, byte[] key)
public int get(CacheBroker cache, String namespace, byte[] key)
{
return Ints.fromByteArray(cache.get(identifier, key));
return Ints.fromByteArray(cache.get(new CacheBroker.NamedKey(namespace, key)));
}
}