problem: tries to connect to Redis even if specified as disabled

src/main/kotlin/io/emeraldpay/dshackle/config/CacheConfigReader.kt

@@ -35,6 +35,8 @@ class CacheConfigReader : YamlConfigReader(), ConfigReader<CacheConfig> {
             val config = CacheConfig()
             getMapping(node, "redis")?.let { node ->
                 val redis = CacheConfig.Redis()
+                val enabled = getValueAsBool(node, "enabled") ?: true
+                if (enabled) {
                     getValueAsString(node, "host")?.let {
                         redis.host = it
                     }
@@ -49,6 +51,7 @@ class CacheConfigReader : YamlConfigReader(), ConfigReader<CacheConfig> {
                     }
                     config.redis = redis
                 }
+            }
             if (config.redis == null) {
                 return null
             }

src/test/groovy/io/emeraldpay/dshackle/config/CacheConfigReaderSpec.groovy

@@ -36,4 +36,15 @@ class CacheConfigReaderSpec extends Specification {
             password == "HelloWorld!1"
         }
     }
+
+    def "Read disabled"() {
+        setup:
+        def config = this.class.getClassLoader().getResourceAsStream("cache-redis-disabled.yaml")
+        when:
+        def act = reader.read(config)
+
+        then:
+        //later may be not null if we support something else besides Redis
+        act == null
+    }
 }

src/test/resources/cache-redis-disabled.yaml

@@ -0,0 +1,7 @@
+cache:
+  redis:
+    enabled: false
+    host: redis-master
+    port: 1234
+    db: 5
+    password: HelloWorld!1