Add initial Hash configuration. Add the HashDetailsHandler.

src/main/java/io/kamax/mxisd/hash/HashManager.java

@@ -0,0 +1,62 @@
+package io.kamax.mxisd.hash;
+
+import io.kamax.mxisd.config.HashingConfig;
+import io.kamax.mxisd.lookup.provider.IThreePidProvider;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.List;
+
+public class HashManager {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(HashManager.class);
+
+    private HashEngine hashEngine;
+    private HashRotationStrategy rotationStrategy;
+    private HashStorage hashStorage;
+    private HashingConfig config;
+
+    public void init(HashingConfig config, List<? extends IThreePidProvider> providers) {
+        this.config = config;
+        initStorage();
+        hashEngine = new HashEngine(providers, getHashStorage(), config);
+        initRotationStrategy();
+    }
+
+    private void initStorage() {
+        switch (config.getHashStorageType()) {
+            case IN_MEMORY:
+                this.hashStorage = new InMemoryHashStorage();
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown storage type: " + config.getHashStorageType());
+        }
+    }
+
+    private void initRotationStrategy() {
+        switch (config.getRotationPolicy()) {
+            case PER_REQUESTS:
+                this.rotationStrategy = new RotationPerRequests();
+                break;
+            default:
+                throw new IllegalArgumentException("Unknown rotation type: " + config.getHashStorageType());
+        }
+        this.rotationStrategy.register(getHashEngine());
+    }
+
+    public HashEngine getHashEngine() {
+        return hashEngine;
+    }
+
+    public HashRotationStrategy getRotationStrategy() {
+        return rotationStrategy;
+    }
+
+    public HashStorage getHashStorage() {
+        return hashStorage;
+    }
+
+    public HashingConfig getConfig() {
+        return config;
+    }
+}