```
public final class Kos
extends Object
```
Singleton class that holds kos context. This class was designed to store important configurable pieces from Vert.x, and a few internal kos configuration. Developers are encouraged to use this class only before the server is started, as changes made after that will not be automatically propagated.

Field Summary

Fields
Modifier and Type	Field	Description
`static Lang.Lazy<io.vertx.core.json.JsonObject>`	`config`	Default configuration.
`private static Lang.Lazy<io.vertx.config.ConfigRetriever>`	`configRetriever`
`static kos.core.client.Serializer`	`defaultRestClientSerializer`	Default `Serializer` for Rest Clients.
`static Serializer`	`defaultSerializer`	Default `Serializer` for http requests.
`static int`	`defaultStatusForEmptyResponses`	Defines the default status code to sent when either no response body is defined or the response body is empty.
`static Supplier<io.vertx.core.Vertx>`	`defaultVertx`	Default reference to a `Vertx` instance.
`static Lang.Lazy<ExceptionHandler>`	`exceptionHandler`	Default `ExceptionHandler`.
`static ImplementationLoader`	`implementationLoader`	The configured `ImplementationLoader`.
`private static io.vertx.core.spi.logging.LogDelegateFactory`	`logFactory`
`private static ConcurrentMap<String,io.vertx.core.logging.Logger>`	`loggers`
`static PayloadSerializationStrategy`	`payloadSerializationStrategy`	Serialization strategy used to serialize/deserialize objects.
`static Map<String,kos.core.client.Serializer>`	`restClientSerializers`	Found serializers for Rest Clients.
`static Map<String,Serializer>`	`serializers`	Found serializers for Http Requests.
`private static ImplementationLoader`	`spi`
`static Lang.Lazy<StringConverter>`	`stringConverter`	Default `StringConverter`.
`static Lang.Lazy<io.vertx.ext.web.client.WebClient>`	`webClient`	Default WebClient.

Constructor Summary

Constructors
Constructor Description

Kos()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`private static io.vertx.config.ConfigRetriever`	`loadConfigRetriever()`
`private static io.vertx.core.Vertx`	`loadDefaultVertX()`
`private static io.vertx.core.spi.logging.LogDelegateFactory`	`loadLogDelegateFactory()`	Alternative log loader that uses SPI to load the log configuration but will otherwise honour the property defined by `LoggerFactory.LOGGER_DELEGATE_FACTORY_CLASS_NAME`.
`private static io.vertx.core.spi.logging.LogDelegateFactory`	`loadLogDelegateFactory(String canonicalName)`	Reads the LogDelegateFactory by reflection.
`private static Map<String,kos.core.client.Serializer>`	`loadRestClientSerializers()`
`private static Map<String,Serializer>`	`loadSerializers()`
`static io.vertx.core.logging.Logger`	`logger(Class type)`	Returns a Logger for a given class.
`static void`	`readConfig(io.vertx.core.Handler<io.vertx.core.json.JsonObject> handler)`	Reads the configuration from the different `ConfigStore` and computes the final configuration.

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

- Field Detail
  - spi
```
private static final ImplementationLoader spi
```
  - serializers
```
public static final Map<String,Serializer> serializers
```
    Found serializers for Http Requests.
    
    See Also:
    
    Serializer, defaultSerializer
  - defaultSerializer
```
public static final Serializer defaultSerializer
```
    Default Serializer for http requests. If not otherwise configured, this will be used to deserialize payloads from incoming requests or to automatically serialize response objects.
  - restClientSerializers
```
public static final Map<String,kos.core.client.Serializer> restClientSerializers
```
    Found serializers for Rest Clients.
    
    See Also:
    
    Serializer, defaultRestClientSerializer
  - defaultRestClientSerializer
```
public static kos.core.client.Serializer defaultRestClientSerializer
```
    Default Serializer for Rest Clients. If not otherwise configured, this will be used to deserialize payloads received as a request response or to automatically serialize objects used as request payload.
  - payloadSerializationStrategy
```
public static PayloadSerializationStrategy payloadSerializationStrategy
```
    Serialization strategy used to serialize/deserialize objects.
  - defaultStatusForEmptyResponses
```
public static final int defaultStatusForEmptyResponses
```
    Defines the default status code to sent when either no response body is defined or the response body is empty. Defaults to 204, following the semantics suggested by HTTP RFC.
    See: https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/204
    
    See Also:
    
    Constant Field Values
  - logFactory
```
private static final io.vertx.core.spi.logging.LogDelegateFactory logFactory
```
  - loggers
```
private static final ConcurrentMap<String,io.vertx.core.logging.Logger> loggers
```
  - implementationLoader
```
public static final ImplementationLoader implementationLoader
```
    The configured ImplementationLoader.
  - defaultVertx
```
public static final Supplier<io.vertx.core.Vertx> defaultVertx
```
    Default reference to a Vertx instance.
  - stringConverter
```
public static final Lang.Lazy<StringConverter> stringConverter
```
    Default StringConverter.
  - exceptionHandler
```
public static final Lang.Lazy<ExceptionHandler> exceptionHandler
```
    Default ExceptionHandler.
  - config
```
public static final Lang.Lazy<io.vertx.core.json.JsonObject> config
```
    Default configuration. It is lazily loaded by the ConfigRetriever found in the classpath.
  - configRetriever
```
private static final Lang.Lazy<io.vertx.config.ConfigRetriever> configRetriever
```
  - webClient
```
public static final Lang.Lazy<io.vertx.ext.web.client.WebClient> webClient
```
    Default WebClient.
- Constructor Detail
  - Kos
```
public Kos()
```
- Method Detail
  - loadSerializers
```
private static Map<String,Serializer> loadSerializers()
```
  - loadRestClientSerializers
```
private static Map<String,kos.core.client.Serializer> loadRestClientSerializers()
```
  - loadLogDelegateFactory
```
private static io.vertx.core.spi.logging.LogDelegateFactory loadLogDelegateFactory()
```
    Alternative log loader that uses SPI to load the log configuration but will otherwise honour the property defined by LoggerFactory.LOGGER_DELEGATE_FACTORY_CLASS_NAME. Despite of its new mechanism, it tries its best to propagate the found LogDelegateFactory and make it available for other logs that relies on LoggerFactory.getLogger(Class).
    
    Returns:
    
    the found LogDelegateFactory.
  - loadLogDelegateFactory
```
private static io.vertx.core.spi.logging.LogDelegateFactory loadLogDelegateFactory(String canonicalName)
```
    Reads the LogDelegateFactory by reflection. Originally copied from LoggerFactory.getLogger(String).
    
    See Also:
    
    LoggerFactory
  - logger
```
public static io.vertx.core.logging.Logger logger(Class type)
```
    Returns a Logger for a given class.
  - loadDefaultVertX
```
private static io.vertx.core.Vertx loadDefaultVertX()
```
  - loadConfigRetriever
```
private static io.vertx.config.ConfigRetriever loadConfigRetriever()
```
  - readConfig
```
public static void readConfig(io.vertx.core.Handler<io.vertx.core.json.JsonObject> handler)
```
    Reads the configuration from the different ConfigStore and computes the final configuration.
    
    Parameters:
    
    handler - handler receiving the computed configuration
    
    Throws:
    
    KosException - if couldn't read the configuration

Class Kos

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

spi

serializers

defaultSerializer

restClientSerializers

defaultRestClientSerializer

payloadSerializationStrategy

defaultStatusForEmptyResponses

logFactory

loggers

implementationLoader

defaultVertx

stringConverter

exceptionHandler

config

configRetriever

webClient

Constructor Detail

Kos

Method Detail

loadSerializers

loadRestClientSerializers

loadLogDelegateFactory

loadLogDelegateFactory

logger

loadDefaultVertX

loadConfigRetriever

readConfig