preserve exisiting api compatibility

Author: SylvainJuge

baggage-processor/README.md

@@ -63,32 +63,25 @@ To configure the span and log processors to copy all baggage entries during conf
 
 ```java
 import io.opentelemetry.contrib.baggage.processor;
+
 // ...
 
 TracerProvider tracerProvider = SdkTracerProvider.builder()
-    .addSpanProcessor(BaggageSpanProcessor.allowAllBaggageKeys())
+    .addSpanProcessor(new BaggageSpanProcessor(Collections.singletonList("*"), null))
     .build();
 
 LoggerProvider loggerProvider = SdkLoggerProvider.builder()
-    .addLogRecordProcessor(BaggageLogRecordProcessor.allowAllBaggageKeys())
+    .addLogProcessor(new BaggageLogProcessor(Collections.singletonList("*"), null))
     .build();
 ```
 
-Alternatively, you can provide a custom baggage key predicate to select which baggage keys you want to copy.
-
-For example, to only copy baggage entries that start with `my-key`:
-
-```java
-new BaggageSpanProcessor(baggageKey -> baggageKey.startsWith("my-key"));
-new BaggageLogRecordProcessor(baggageKey -> baggageKey.startsWith("my-key"));
-```
+Alternatively, you can provide a custom baggage key wildcard to select which baggage keys you want to copy.
 
-For example, to only copy baggage entries that match the regex `^key.+`:
+For example, to only copy baggage entries that start with `my-key` and ignore keys that end with `*-ignored`
 
 ```java
-Pattern pattern = Pattern.compile("^key.+");
-new BaggageSpanProcessor(baggageKey -> pattern.matcher(baggageKey).matches());
-new BaggageLogRecordProcessor(baggageKey -> pattern.matcher(baggageKey).matches());
+new BaggageSpanProcessor(singletonList("my-key*"), singletonList("*-ignored"));
+new BaggageLogRecordProcessor(singletonList("my-key*"), singletonList("*-ignored"));
 ```
 
 ## Component owners

baggage-processor/src/main/java/io/opentelemetry/contrib/baggage/processor/BaggageLogRecordProcessor.java

@@ -44,6 +44,16 @@ public BaggageLogRecordProcessor(
     this.baggageKeyPredicate = IncludeExcludePredicate.createPatternMatching(included, excluded);
   }
 
+  /**
+   * @deprecated use {@code new BaggageLogRecordProcessor(Collections.singletonList("*),null)}
+   *     instead
+   * @return baggage log processor including all attributes
+   */
+  @Deprecated
+  public static BaggageLogRecordProcessor allowAllBaggageKeys() {
+    return new BaggageLogRecordProcessor(excluded -> true);
+  }
+
   @Override
   public void onEmit(Context context, ReadWriteLogRecord logRecord) {
     Baggage.fromContext(context)

baggage-processor/src/main/java/io/opentelemetry/contrib/baggage/processor/BaggageSpanProcessor.java

@@ -44,6 +44,15 @@ public BaggageSpanProcessor(
     this.baggageKeyPredicate = IncludeExcludePredicate.createPatternMatching(included, excluded);
   }
 
+  /**
+   * @deprecated use {@code new BaggageSpanProcessor(Collections.singletonList("*),null)} instead
+   * @return baggage span processor including all attributes
+   */
+  @Deprecated
+  public static BaggageSpanProcessor allowAllBaggageKeys() {
+    return new BaggageSpanProcessor(baggageKey -> true);
+  }
+
   @Override
   public void onStart(Context parentContext, ReadWriteSpan span) {
     Baggage.fromContext(parentContext)