http://nexus.sonatype.org/oss-repository-hosting.html/vertx-parent/vertx-rx/vertx-rx-java-gen: Sonatype helps open source projects to set up Maven repositories on https://oss.sonatype.org/ (Eclipse) 
public class io.vertx.rx.java.ObservableOnSubscribeAdapter<T> implements rx.Observable$OnSubscribe<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: io.vertx.rx.java.ObservableOnSubscribeAdapter
  super_class: java.lang.Object
{
  protected final java.util.concurrent.atomic.AtomicReference<io.vertx.rx.java.ObservableOnSubscribeAdapter<T>.SingleSubscription> subRef;
    descriptor: Ljava/util/concurrent/atomic/AtomicReference;
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Signature: Ljava/util/concurrent/atomic/AtomicReference<Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>.SingleSubscription;>;

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
         0: .line 12
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 14
            aload 0 /* this */
            new java.util.concurrent.atomic.AtomicReference
            dup
            invokespecial java.util.concurrent.atomic.AtomicReference.<init>:()V
            putfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
         2: .line 12
            return
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;

  public void call(rx.Subscriber<? super T>);
    descriptor: (Lrx/Subscriber;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=2
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
        start local 1 // rx.Subscriber sub
         0: .line 22
            new io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription
            dup
            aload 0 /* this */
            aload 1 /* sub */
            invokespecial io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription.<init>:(Lio/vertx/rx/java/ObservableOnSubscribeAdapter;Lrx/Subscriber;)V
            astore 2 /* singleSub */
        start local 2 // io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription singleSub
         1: .line 23
            aload 0 /* this */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
            aconst_null
            aload 2 /* singleSub */
            invokevirtual java.util.concurrent.atomic.AtomicReference.compareAndSet:(Ljava/lang/Object;Ljava/lang/Object;)Z
            ifne 3
         2: .line 24
            new java.lang.IllegalStateException
            dup
            ldc "Cannot have multiple subscriptions"
            invokespecial java.lang.IllegalStateException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 26
      StackMap locals: io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription
      StackMap stack:
            aload 1 /* sub */
            aload 2 /* singleSub */
            invokevirtual rx.Subscriber.add:(Lrx/Subscription;)V
         4: .line 28
            aload 0 /* this */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.onSubscribed:()V
         5: .line 29
            goto 8
         6: .line 32
      StackMap locals:
      StackMap stack: java.lang.Throwable
            astore 3 /* t */
        start local 3 // java.lang.Throwable t
         7: .line 33
            aload 0 /* this */
            aload 3 /* t */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.fireError:(Ljava/lang/Throwable;)V
        end local 3 // java.lang.Throwable t
         8: .line 35
      StackMap locals:
      StackMap stack:
            return
        end local 2 // io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription singleSub
        end local 1 // rx.Subscriber sub
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    9     0       this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            0    9     1        sub  Lrx/Subscriber<-TT;>;
            1    9     2  singleSub  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>.SingleSubscription;
            7    8     3          t  Ljava/lang/Throwable;
      Exception table:
        from    to  target  type
           4     5       6  Class java.lang.Throwable
    Signature: (Lrx/Subscriber<-TT;>;)V
    MethodParameters:
      Name  Flags
      sub   

  protected void onSubscribed();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=0, locals=1, args_size=1
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
         0: .line 40
            return
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;

  protected void onUnsubscribed();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=0, locals=1, args_size=1
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
         0: .line 43
            return
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;

  protected final void fireNext();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
        start local 1 // java.lang.Object next
         0: .line 51
            aload 0 /* this */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.getSubscriber:()Lrx/Subscriber;
            astore 2 /* s */
        start local 2 // rx.Subscriber s
         1: .line 52
            aload 2 /* s */
            ifnull 3
         2: .line 53
            aload 2 /* s */
            aload 1 /* next */
            invokevirtual rx.Subscriber.onNext:(Ljava/lang/Object;)V
         3: .line 55
      StackMap locals: rx.Subscriber
      StackMap stack:
            return
        end local 2 // rx.Subscriber s
        end local 1 // java.lang.Object next
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            0    4     1  next  TT;
            1    4     2     s  Lrx/Subscriber<-TT;>;
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      next  

  protected final void fireResult();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0014) ACC_PROTECTED, ACC_FINAL
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
        start local 1 // java.lang.Object res
         0: .line 61
            aload 0 /* this */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.getSubscriber:()Lrx/Subscriber;
            astore 2 /* s */
        start local 2 // rx.Subscriber s
         1: .line 62
            aload 2 /* s */
            ifnull 5
         2: .line 63
            aload 2 /* s */
            aload 1 /* res */
            invokevirtual rx.Subscriber.onNext:(Ljava/lang/Object;)V
         3: .line 64
            aload 0 /* this */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
            aconst_null
            invokevirtual java.util.concurrent.atomic.AtomicReference.set:(Ljava/lang/Object;)V
         4: .line 65
            aload 2 /* s */
            invokevirtual rx.Subscriber.onCompleted:()V
         5: .line 67
      StackMap locals: rx.Subscriber
      StackMap stack:
            return
        end local 2 // rx.Subscriber s
        end local 1 // java.lang.Object res
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            0    6     1   res  TT;
            1    6     2     s  Lrx/Subscriber<-TT;>;
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      res   

  protected void fireComplete();
    descriptor: ()V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
         0: .line 73
            aload 0 /* this */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.getSubscriber:()Lrx/Subscriber;
            astore 1 /* s */
        start local 1 // rx.Subscriber s
         1: .line 74
            aload 1 /* s */
            ifnull 4
         2: .line 75
            aload 0 /* this */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
            aconst_null
            invokevirtual java.util.concurrent.atomic.AtomicReference.set:(Ljava/lang/Object;)V
         3: .line 76
            aload 1 /* s */
            invokevirtual rx.Subscriber.onCompleted:()V
         4: .line 78
      StackMap locals: rx.Subscriber
      StackMap stack:
            return
        end local 1 // rx.Subscriber s
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            1    5     1     s  Lrx/Subscriber<-TT;>;

  protected void fireError(java.lang.Throwable);
    descriptor: (Ljava/lang/Throwable;)V
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
        start local 1 // java.lang.Throwable t
         0: .line 84
            aload 0 /* this */
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.getSubscriber:()Lrx/Subscriber;
            astore 2 /* s */
        start local 2 // rx.Subscriber s
         1: .line 85
            aload 2 /* s */
            ifnull 4
         2: .line 86
            aload 0 /* this */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
            aconst_null
            invokevirtual java.util.concurrent.atomic.AtomicReference.set:(Ljava/lang/Object;)V
         3: .line 87
            aload 2 /* s */
            aload 1 /* t */
            invokevirtual rx.Subscriber.onError:(Ljava/lang/Throwable;)V
         4: .line 89
      StackMap locals: rx.Subscriber
      StackMap stack:
            return
        end local 2 // rx.Subscriber s
        end local 1 // java.lang.Throwable t
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            0    5     1     t  Ljava/lang/Throwable;
            1    5     2     s  Lrx/Subscriber<-TT;>;
    MethodParameters:
      Name  Flags
      t     

  protected rx.Subscriber<? super T> getSubscriber();
    descriptor: ()Lrx/Subscriber;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=2, args_size=1
        start local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
         0: .line 95
            aload 0 /* this */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter.subRef:Ljava/util/concurrent/atomic/AtomicReference;
            invokevirtual java.util.concurrent.atomic.AtomicReference.get:()Ljava/lang/Object;
            checkcast io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription
            astore 1 /* singleSub */
        start local 1 // io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription singleSub
         1: .line 96
            aload 1 /* singleSub */
            ifnull 2
            aload 1 /* singleSub */
            getfield io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription.subscriber:Lrx/Subscriber;
            goto 3
      StackMap locals: io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription
      StackMap stack:
         2: aconst_null
      StackMap locals:
      StackMap stack: rx.Subscriber
         3: areturn
        end local 1 // io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription singleSub
        end local 0 // io.vertx.rx.java.ObservableOnSubscribeAdapter this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    4     0       this  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>;
            1    4     1  singleSub  Lio/vertx/rx/java/ObservableOnSubscribeAdapter<TT;>.SingleSubscription;
    Signature: ()Lrx/Subscriber<-TT;>;

  public void call(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast rx.Subscriber
            invokevirtual io.vertx.rx.java.ObservableOnSubscribeAdapter.call:(Lrx/Subscriber;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lrx/Observable$OnSubscribe<TT;>;
SourceFile: "ObservableOnSubscribeAdapter.java"
NestMembers:
  io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription
InnerClasses:
  SingleSubscription = io.vertx.rx.java.ObservableOnSubscribeAdapter$SingleSubscription of io.vertx.rx.java.ObservableOnSubscribeAdapter
  public abstract OnSubscribe = rx.Observable$OnSubscribe of rx.Observable