#3 change sessions impl

stbf-common/src/main/java/ru/penkrat/stbf/common/command/SessionAwareCommandChain.java

@@ -0,0 +1,20 @@
+package ru.penkrat.stbf.common.command;
+
+import lombok.RequiredArgsConstructor;
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotResponse;
+import ru.penkrat.stbf.api.CommandChain;
+import ru.penkrat.stbf.api.SessionProvider;
+import ru.penkrat.stbf.common.session.SessionAwareBotRequest;
+
+@RequiredArgsConstructor
+public class SessionAwareCommandChain implements CommandChain {
+
+	private final CommandChain delegate;
+	private final SessionProvider sessionProvider;
+
+	@Override
+	public void processCommand(BotRequest botRequest, BotResponse botResponse) {
+		delegate.processCommand(new SessionAwareBotRequest(botRequest, sessionProvider), botResponse);
+	}
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/command/ThreadPolledCommandChain.java

@@ -0,0 +1,31 @@
+package ru.penkrat.stbf.common.command;
+
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotResponse;
+import ru.penkrat.stbf.api.CommandChain;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class ThreadPolledCommandChain implements CommandChain {
+
+	private final CommandChain delegate;
+	private final ExecutorService executor;
+
+	public ThreadPolledCommandChain(CommandChain delegate) {
+		this(delegate, 4);
+	}
+
+	public ThreadPolledCommandChain(CommandChain delegate, int nThreads) {
+		this.delegate = delegate;
+		this.executor = Executors.newFixedThreadPool(nThreads);
+	}
+
+	@Override
+	public void processCommand(BotRequest botRequest, BotResponse botResponse) {
+		executor.execute(() -> {
+			delegate.processCommand(botRequest, botResponse);
+		});
+	}
+
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/session/SessionAwareBotRequest.java

@@ -0,0 +1,49 @@
+package ru.penkrat.stbf.common.session;
+
+import lombok.RequiredArgsConstructor;
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotSession;
+import ru.penkrat.stbf.api.SessionProvider;
+
+import java.util.Objects;
+import java.util.Optional;
+
+@RequiredArgsConstructor
+public class SessionAwareBotRequest implements BotRequest {
+
+	private final BotRequest delegate;
+
+	private final SessionProvider sessionProvider;
+
+	private BotSession botSession;
+
+	@Override
+	public BotSession getSession() {
+		if (botSession == null) {
+			botSession = sessionProvider.get(getChatId());
+			Objects.requireNonNull(botSession, "Session can not be null");
+		}
+		return botSession;
+	}
+
+	public Optional<String> getMessageText() {
+		return this.delegate.getMessageText();
+	}
+
+	public Optional<String> getPhoneNumber() {
+		return this.delegate.getPhoneNumber();
+	}
+
+	public Optional<String> getCallbackData() {
+		return this.delegate.getCallbackData();
+	}
+
+	public Optional<String> getCallbackMessageText() {
+		return this.delegate.getCallbackMessageText();
+	}
+
+	public Long getChatId() {
+		return this.delegate.getChatId();
+	}
+
+}