ServiceConfigUtil (grpc-core 1.21.0 API)

java.lang.Object
- io.grpc.internal.ServiceConfigUtil

```
public final class ServiceConfigUtil
extends Object
```
Helper utility to work with service configs.
This class contains helper methods to parse service config JSON values into Java types.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`ServiceConfigUtil.LbConfig` A LoadBalancingConfig that includes the policy name (the key) and its raw config value (parsed JSON).

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static String`	`getBalancerNameFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)` Extracts the loadbalancer name from xds loadbalancer config.
`static List<ServiceConfigUtil.LbConfig>`	`getChildPolicyFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)` Extracts list of child policies from xds loadbalancer config.
`static List<ServiceConfigUtil.LbConfig>`	`getFallbackPolicyFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)` Extracts list of fallback policies from xds loadbalancer config.
`static String`	`getHealthCheckedServiceName(Map<String,?> serviceConfig)` Fetch the health-checked service name from service config.
`static List<Map<String,?>>`	`getLoadBalancingConfigsFromServiceConfig(Map<String,?> serviceConfig)` Extracts load balancing configs from a service config.
`static String`	`getStickinessMetadataKeyFromServiceConfig(Map<String,?> serviceConfig)` Extracts the stickiness metadata key from a service config, or `null`.
`static ServiceConfigUtil.LbConfig`	`unwrapLoadBalancingConfig(Map<String,?> lbConfig)` Unwrap a LoadBalancingConfig JSON object into a `ServiceConfigUtil.LbConfig`.
`static List<ServiceConfigUtil.LbConfig>`	`unwrapLoadBalancingConfigList(List<Map<String,?>> list)` Given a JSON list of LoadBalancingConfigs, and convert it into a list of LbConfig.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getHealthCheckedServiceName

@Nullable
public static String getHealthCheckedServiceName(@Nullable
                                                           Map<String,?> serviceConfig)

Fetch the health-checked service name from service config. null if can't find one.

getLoadBalancingConfigsFromServiceConfig

public static List<Map<String,?>> getLoadBalancingConfigsFromServiceConfig(Map<String,?> serviceConfig)

Extracts load balancing configs from a service config.

unwrapLoadBalancingConfig
```
public static ServiceConfigUtil.LbConfig unwrapLoadBalancingConfig(Map<String,?> lbConfig)
```
Unwrap a LoadBalancingConfig JSON object into a ServiceConfigUtil.LbConfig. The input is a JSON object (map) with exactly one entry, where the key is the policy name and the value is a config object for that policy.

unwrapLoadBalancingConfigList
```
public static List<ServiceConfigUtil.LbConfig> unwrapLoadBalancingConfigList(List<Map<String,?>> list)
```
Given a JSON list of LoadBalancingConfigs, and convert it into a list of LbConfig.

getBalancerNameFromXdsConfig

public static String getBalancerNameFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)

Extracts the loadbalancer name from xds loadbalancer config.

getChildPolicyFromXdsConfig

@Nullable
public static List<ServiceConfigUtil.LbConfig> getChildPolicyFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)

Extracts list of child policies from xds loadbalancer config.

getFallbackPolicyFromXdsConfig

@Nullable
public static List<ServiceConfigUtil.LbConfig> getFallbackPolicyFromXdsConfig(ServiceConfigUtil.LbConfig xdsConfig)

Extracts list of fallback policies from xds loadbalancer config.

getStickinessMetadataKeyFromServiceConfig

@Nullable
public static String getStickinessMetadataKeyFromServiceConfig(Map<String,?> serviceConfig)

Extracts the stickiness metadata key from a service config, or null.

Class ServiceConfigUtil