[energidataservice] Introduce subscription-based providers (openhab#17456)

* Introduce subscription-based providers

Signed-off-by: Jacob Laursen <[email protected]>

Author: jlaur

bundles/org.openhab.binding.energidataservice/src/main/java/org/openhab/binding/energidataservice/internal/ApiController.java

@@ -27,6 +27,7 @@
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
+import java.util.function.Supplier;
 import java.util.stream.Collectors;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
@@ -86,12 +87,12 @@ public class ApiController {
             .create();
     private final HttpClient httpClient;
     private final TimeZoneProvider timeZoneProvider;
-    private final String userAgent;
+    private final Supplier<String> userAgentSupplier;
 
     public ApiController(HttpClient httpClient, TimeZoneProvider timeZoneProvider) {
         this.httpClient = httpClient;
         this.timeZoneProvider = timeZoneProvider;
-        userAgent = "openHAB/" + FrameworkUtil.getBundle(this.getClass()).getVersion().toString();
+        this.userAgentSupplier = this::getUserAgent;
     }
 
     /**
@@ -116,7 +117,7 @@ public ElspotpriceRecord[] getSpotPrices(String priceArea, Currency currency, Da
                 .param("start", start.toString()) //
                 .param("filter", "{\"" + FILTER_KEY_PRICE_AREA + "\":\"" + priceArea + "\"}") //
                 .param("columns", "HourUTC,SpotPrice" + currency) //
-                .agent(userAgent) //
+                .agent(userAgentSupplier.get()) //
                 .method(HttpMethod.GET);
 
         if (!end.isEmpty()) {
@@ -138,6 +139,10 @@ public ElspotpriceRecord[] getSpotPrices(String priceArea, Currency currency, Da
         }
     }
 
+    private String getUserAgent() {
+        return "openHAB/" + FrameworkUtil.getBundle(this.getClass()).getVersion().toString();
+    }
+
     private String sendRequest(Request request, Map<String, String> properties)
             throws TimeoutException, ExecutionException, InterruptedException, DataServiceException {
         logger.trace("GET request for {}", request.getURI());
@@ -210,7 +215,7 @@ public Collection<DatahubPricelistRecord> getDatahubPriceLists(GlobalLocationNum
                 .timeout(REQUEST_TIMEOUT_SECONDS, TimeUnit.SECONDS) //
                 .param("filter", mapToFilter(filterMap)) //
                 .param("columns", columns) //
-                .agent(userAgent) //
+                .agent(userAgentSupplier.get()) //
                 .method(HttpMethod.GET);
 
         DateQueryParameter start = tariffFilter.getStart();
@@ -277,7 +282,7 @@ public CO2EmissionRecord[] getCo2Emissions(Dataset dataset, String priceArea, Da
                 .param("filter", "{\"" + FILTER_KEY_PRICE_AREA + "\":\"" + priceArea + "\"}") //
                 .param("columns", "Minutes5UTC,CO2Emission") //
                 .param("sort", "Minutes5UTC DESC") //
-                .agent(userAgent) //
+                .agent(userAgentSupplier.get()) //
                 .method(HttpMethod.GET);
 
         try {

bundles/org.openhab.binding.energidataservice/src/main/java/org/openhab/binding/energidataservice/internal/CacheManager.java

@@ -17,6 +17,8 @@
 import java.time.ZoneId;
 import java.util.Currency;
 import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 import org.eclipse.jdt.annotation.NonNullByDefault;
 import org.openhab.core.thing.ChannelUID;
@@ -62,6 +64,12 @@ public class EnergiDataServiceBindingConstants {
             CHANNEL_SYSTEM_TARIFF, CHANNEL_TRANSMISSION_GRID_TARIFF, CHANNEL_ELECTRICITY_TAX,
             CHANNEL_REDUCED_ELECTRICITY_TAX);
 
+    public static final Set<String> CO2_EMISSION_CHANNELS = Set.of(CHANNEL_CO2_EMISSION_PROGNOSIS,
+            CHANNEL_CO2_EMISSION_REALTIME);
+
+    public static final Set<String> SUBSCRIPTION_CHANNELS = Stream
+            .concat(ELECTRICITY_CHANNELS.stream(), CO2_EMISSION_CHANNELS.stream()).collect(Collectors.toSet());
+
     // List of all properties
     public static final String PROPERTY_REMAINING_CALLS = "remainingCalls";
     public static final String PROPERTY_TOTAL_CALLS = "totalCalls";