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Use java 8 features in TierSelectorStrategy implementations (#4827) 

* Use java 8 features in TierSelectorStrategy implementations
* Minor code cleanup

* More java8 coolness

* Code comments
This commit is contained in:
Charles Allen 2017-09-20 20:09:29 -07:00 committed by Roman Leventov
parent a36adc63e4
commit 47ebc48059
3 changed files with 3 additions and 33 deletions
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12
server/src/main/java/io/druid/client/selector/CustomTierSelectorStrategy.java
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@ -22,7 +22,6 @@ package io.druid.client.selector;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.google.common.collect.Maps;
import com.google.common.primitives.Ints;
import java.util.Comparator;
import java.util.Map;
@ -48,16 +47,7 @@ public class CustomTierSelectorStrategy extends AbstractTierSelectorStrategy
pos++;
}
this.comparator = new Comparator<Integer>()
{
@Override
public int compare(Integer o1, Integer o2)
{
int pos1 = lookup.get(o1);
int pos2 = lookup.get(o2);
return Ints.compare(pos1, pos2);
}
};
this.comparator = Comparator.comparingInt(lookup::get);
}
@Override

12
server/src/main/java/io/druid/client/selector/HighestPriorityTierSelectorStrategy.java
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@ -21,7 +21,6 @@ package io.druid.client.selector;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.google.common.primitives.Ints;
import java.util.Comparator;
@ -29,15 +28,6 @@ import java.util.Comparator;
*/
public class HighestPriorityTierSelectorStrategy extends AbstractTierSelectorStrategy
{
private static final Comparator<Integer> comparator = new Comparator<Integer>()
{
@Override
public int compare(Integer o1, Integer o2)
{
return Ints.compare(o2, o1);
}
};
@JsonCreator
public HighestPriorityTierSelectorStrategy(@JacksonInject ServerSelectorStrategy serverSelectorStrategy)
{
@ -47,6 +37,6 @@ public class HighestPriorityTierSelectorStrategy extends AbstractTierSelectorStr
@Override
public Comparator<Integer> getComparator()
{
return comparator;
return Comparator.reverseOrder();
}
}

12
server/src/main/java/io/druid/client/selector/LowestPriorityTierSelectorStrategy.java
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@ -21,7 +21,6 @@ package io.druid.client.selector;
import com.fasterxml.jackson.annotation.JacksonInject;
import com.fasterxml.jackson.annotation.JsonCreator;
import com.google.common.primitives.Ints;
import java.util.Comparator;
@ -29,15 +28,6 @@ import java.util.Comparator;
*/
public class LowestPriorityTierSelectorStrategy extends AbstractTierSelectorStrategy
{
private static final Comparator<Integer> comparator = new Comparator<Integer>()
{
@Override
public int compare(Integer o1, Integer o2)
{
return Ints.compare(o1, o2);
}
};
@JsonCreator
public LowestPriorityTierSelectorStrategy(@JacksonInject ServerSelectorStrategy serverSelectorStrategy)
{
@ -47,6 +37,6 @@ public class LowestPriorityTierSelectorStrategy extends AbstractTierSelectorStra
@Override
public Comparator<Integer> getComparator()
{
return comparator;
return Comparator.naturalOrder();
}
}