1 /*

     2  * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.tracing;

    27 

    28 import java.lang.reflect.Method;

    29 import java.io.PrintStream;

    30 import java.util.HashMap;

    31 

    32 import com.sun.tracing.ProviderFactory;

    33 import com.sun.tracing.Provider;

    34 import com.sun.tracing.ProviderName;

    35 import com.sun.tracing.Probe;

    36 import com.sun.tracing.ProbeName;

    37 

    38 /**

    39  * Factory class to create tracing Providers.

    40  *

    41  * This factory will create tracing instances that print to a PrintStream

    42  * when activated.

    43  *

    44  * @since 1.7

    45  */

    46 public class PrintStreamProviderFactory extends ProviderFactory {

    47 

    48     private PrintStream stream;

    49 

    50     public PrintStreamProviderFactory(PrintStream stream) {

    51         this.stream = stream;

    52     }

    53 

    54     public <T extends Provider> T createProvider(Class<T> cls) {

    55         PrintStreamProvider provider = new PrintStreamProvider(cls, stream);

    56         provider.init();

    57         return provider.newProxyInstance();

    58     }

    59 }

    60 

    61 class PrintStreamProvider extends ProviderSkeleton {

    62 

    63     private PrintStream stream;

    64     private String providerName;

    65 

    66     protected ProbeSkeleton createProbe(Method m) {

    67         String probeName = getAnnotationString(m, ProbeName.class, m.getName());

    68         return new PrintStreamProbe(this, probeName, m.getParameterTypes());

    69     }

    70 

    71     PrintStreamProvider(Class<? extends Provider> type, PrintStream stream) {

    72         super(type);

    73         this.stream = stream;

    74         this.providerName = getProviderName();

    75     }

    76 

    77     PrintStream getStream() {

    78         return stream;

    79     }

    80 

    81     String getName() {

    82         return providerName;

    83     }

    84 }

    85 

    86 class PrintStreamProbe extends ProbeSkeleton {

    87 

    88     private PrintStreamProvider provider;

    89     private String name;

    90 

    91     PrintStreamProbe(PrintStreamProvider p, String name, Class<?>[] params) {

    92         super(params);

    93         this.provider = p;

    94         this.name = name;

    95     }

    96 

    97     public boolean isEnabled() {

    98         return true;

    99     }

   100 

   101     public void uncheckedTrigger(Object[] args) {

   102         StringBuilder sb = new StringBuilder();

   103         sb.append(provider.getName());

   104         sb.append(".");

   105         sb.append(name);

   106         sb.append("(");

   107         boolean first = true;

   108         for (Object o : args) {

   109             if (first == false) {

   110                 sb.append(",");

   111             } else {

   112                 first = false;

   113             }

   114             sb.append(o.toString());

   115         }

   116         sb.append(")");

   117         provider.getStream().println(sb.toString());

   118     }

   119 }

   120