feat(sj_1.2.0-beta1):增加第一和最后一个路由功能

snail-job-server/snail-job-server-common/src/main/java/com/aizuda/snailjob/server/common/allocate/client/ClientLoadBalanceFirst.java

@@ -0,0 +1,17 @@
+package com.aizuda.snailjob.server.common.allocate.client;
+
+import com.aizuda.snailjob.server.common.ClientLoadBalance;
+
+import java.util.TreeSet;
+
+public class ClientLoadBalanceFirst implements ClientLoadBalance {
+    @Override
+    public String route(String key, TreeSet<String> clientAllAddressSet) {
+        return clientAllAddressSet.first();
+    }
+
+    @Override
+    public int routeType() {
+        return ClientLoadBalanceManager.AllocationAlgorithmEnum.FIRST.getType();
+    }
+}

snail-job-server/snail-job-server-common/src/main/java/com/aizuda/snailjob/server/common/allocate/client/ClientLoadBalanceLast.java

@@ -0,0 +1,17 @@
+package com.aizuda.snailjob.server.common.allocate.client;
+
+import com.aizuda.snailjob.server.common.ClientLoadBalance;
+
+import java.util.TreeSet;
+
+public class ClientLoadBalanceLast implements ClientLoadBalance {
+    @Override
+    public String route(String key, TreeSet<String> clientAllAddressSet) {
+        return clientAllAddressSet.last();
+    }
+
+    @Override
+    public int routeType() {
+        return ClientLoadBalanceManager.AllocationAlgorithmEnum.LAST.getType();
+    }
+}

snail-job-server/snail-job-server-common/src/main/java/com/aizuda/snailjob/server/common/allocate/client/ClientLoadBalanceManager.java

@@ -29,7 +29,9 @@ public class ClientLoadBalanceManager {
         CONSISTENT_HASH(1, new ClientLoadBalanceConsistentHash(100)),
         RANDOM(2, new ClientLoadBalanceRandom()),
         LRU(3, new ClientLoadBalanceLRU(100)),
-        ROUND(4, new ClientLoadBalanceRound());
+        ROUND(4, new ClientLoadBalanceRound()),
+        FIRST(5, new ClientLoadBalanceFirst()),
+        LAST(6, new ClientLoadBalanceLast());
 
         private final int type;
         private final ClientLoadBalance clientLoadBalance;