get rid of guava

build.gradle

@@ -21,7 +21,6 @@ allprojects {
 dependencies {
     compile "com.squareup.okhttp3:okhttp:3.8.1"
     compile "org.slf4j:slf4j-api:1.7.22"
-    compile "com.google.guava:guava:19.0"
     testRuntime "ch.qos.logback:logback-classic:1.1.9"
     testCompile "org.mockito:mockito-core:1.10.19"
     testCompile "junit:junit:4.11"

src/main/java/com/launchdarkly/eventsource/EventSource.java

@@ -1,6 +1,5 @@
 package com.launchdarkly.eventsource;
 
-import com.google.common.util.concurrent.ThreadFactoryBuilder;
 import okhttp3.*;
 import okio.BufferedSource;
 import okio.Okio;
@@ -21,12 +20,15 @@
 import java.security.KeyStore;
 import java.util.Arrays;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Random;
 import java.util.concurrent.*;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 
 import static com.launchdarkly.eventsource.ReadyState.*;
+import static java.lang.String.format;
 
 /**
  * Client for <a href="https://www.w3.org/TR/2015/REC-eventsource-20150203/">Server-Sent Events</a>
@@ -60,19 +62,29 @@ public class EventSource implements ConnectionHandler, Closeable {
     this.uri = builder.uri;
     this.headers = addDefaultHeaders(builder.headers);
     this.reconnectTimeMs = builder.reconnectTimeMs;
-    ThreadFactory eventsThreadFactory = new ThreadFactoryBuilder()
-        .setNameFormat("okhttp-eventsource-events-[" + name + "]-%d")
-        .build();
+    ThreadFactory eventsThreadFactory = createThreadFactory("okhttp-eventsource-events");
     this.eventExecutor = Executors.newSingleThreadExecutor(eventsThreadFactory);
-    ThreadFactory streamThreadFactory = new ThreadFactoryBuilder()
-        .setNameFormat("okhttp-eventsource-stream-[" + name + "]-%d")
-        .build();
+    ThreadFactory streamThreadFactory = createThreadFactory("okhttp-eventsource-stream");
     this.streamExecutor = Executors.newSingleThreadExecutor(streamThreadFactory);
     this.handler = new AsyncEventHandler(this.eventExecutor, builder.handler);
     this.readyState = new AtomicReference<>(RAW);
     this.client = builder.clientBuilder.build();
   }
 
+  private ThreadFactory createThreadFactory(final String type) {
+    final ThreadFactory backingThreadFactory =
+            Executors.defaultThreadFactory();
+    final AtomicLong count = new AtomicLong(0);
+    return new ThreadFactory() {
+      @Override
+      public Thread newThread(Runnable runnable) {
+        Thread thread = backingThreadFactory.newThread(runnable);
+        thread.setName(format(Locale.ROOT, "%s-[%s]-%d", type, name, count.getAndIncrement()));
+        return thread;
+      }
+    };
+  }
+
   public void start() {
     if (!readyState.compareAndSet(RAW, CONNECTING)) {
       logger.info("Start method called on this already-started EventSource object. Doing nothing");

src/main/java/com/launchdarkly/eventsource/ModernTLSSocketFactory.java

@@ -1,7 +1,5 @@
 package com.launchdarkly.eventsource;
 
-import com.google.common.annotations.VisibleForTesting;
-
 import javax.net.ssl.SSLContext;
 import javax.net.ssl.SSLSocket;
 import javax.net.ssl.SSLSocketFactory;
@@ -74,7 +72,6 @@ public Socket createSocket(InetAddress inetAddress, int i, InetAddress inetAddre
    * @param s the socket
    * @return
    */
-  @VisibleForTesting
   static Socket setModernTlsVersionsOnSocket(Socket s) {
     if (s != null && (s instanceof SSLSocket)) {
       List<String> defaultEnabledProtocols = Arrays.asList(((SSLSocket) s).getSupportedProtocols());