ArrayList中字符串的唯一实例

时间：2016-12-13 15:01:52

标签： java arraylist groovy

我是Java的新手。我正在构建一个数组列表来保存我的Git提交中的部分文本。我在Jenkins的Groovy脚本中运行它。

 def commits = sh script: """ git log ${previous_tag}..HEAD --oneline --decorate""", returnStdout: true
 def array = commits.split("\\n");

ArrayList<String> mystats = new ArrayList<>(array.length);
 for(int i =0; i < array.length; i++) {
    Pattern pattern = Pattern.compile("^\\w{7}\\s(MYSTATS-|mystats-)");
    Matcher matcher = pattern.matcher(array[i]);
  if(matcher.find()) {
     mystats.add(array[i]) 
  }
 }

我想要做的是创建另一个数组来保存唯一值（所以不要复制任何东西）并且建议HashSet是最好的方法，因为它会拒绝重复的值

// Put all unique mystats matches into a set
 Set<String> mystats_set = new HashSet<String>(mystats.size());
 for(int i =0; i < mystats.size(); i++) {
    Pattern pattern = Pattern.compile("(MYSTATS-|mystats-)\\w+");
    Matcher matcher = pattern.matcher(mystats[i]);
  if(matcher.find()) {
     String id = matcher.group().toUpperCase().toString();
    def jira_json = sh script: '''curl --cert ../certs/dev_cert.p12:password https://jira.dev.organisation.co.uk:port_number/rest/api/2/issue/${id}''', returnStdout: true
     mystats_set.add("[" + id + "](https://jira.dev.organisation.co.uk/browse/" + id + ")");
  }
 }

当这个运行时，我得到了

java.io.NotSerializableException: java.util.regex.Matcher
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:860)
at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(BlockMarshaller.java:65)
at org.jboss.marshalling.river.BlockMarshaller.writeObject(BlockMarshaller.java:56)
at org.jboss.marshalling.MarshallerObjectOutputStream.writeObjectOverride(MarshallerObjectOutputStream.java:50)
at org.jboss.marshalling.river.RiverObjectOutputStream.writeObjectOverride(RiverObjectOutputStream.java:179)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at java.util.HashMap.internalWriteEntries(HashMap.java:1785)
at java.util.HashMap.writeObject(HashMap.java:1362)
at sun.reflect.GeneratedMethodAccessor202.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jboss.marshalling.reflect.SerializableClass.callWriteObject(SerializableClass.java:271)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:976)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:967)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.BlockMarshaller.doWriteObject(BlockMarshaller.java:65)
at org.jboss.marshalling.river.BlockMarshaller.writeObject(BlockMarshaller.java:56)
at org.jboss.marshalling.MarshallerObjectOutputStream.writeObjectOverride(MarshallerObjectOutputStream.java:50)
at org.jboss.marshalling.river.RiverObjectOutputStream.writeObjectOverride(RiverObjectOutputStream.java:179)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at java.util.TreeMap.writeObject(TreeMap.java:2438)
at sun.reflect.GeneratedMethodAccessor204.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.jboss.marshalling.reflect.SerializableClass.callWriteObject(SerializableClass.java:271)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:976)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.river.RiverMarshaller.doWriteFields(RiverMarshaller.java:1032)
at org.jboss.marshalling.river.RiverMarshaller.doWriteSerializableObject(RiverMarshaller.java:988)
at org.jboss.marshalling.river.RiverMarshaller.doWriteObject(RiverMarshaller.java:854)
at org.jboss.marshalling.AbstractObjectOutput.writeObject(AbstractObjectOutput.java:58)
at org.jboss.marshalling.AbstractMarshaller.writeObject(AbstractMarshaller.java:111)
at org.jenkinsci.plugins.workflow.support.pickles.serialization.RiverWriter.writeObject(RiverWriter.java:132)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:429)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.saveProgram(CpsThreadGroup.java:408)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.run(CpsThreadGroup.java:356)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup.access$100(CpsThreadGroup.java:78)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:236)
at org.jenkinsci.plugins.workflow.cps.CpsThreadGroup$2.call(CpsThreadGroup.java:224)
at org.jenkinsci.plugins.workflow.cps.CpsVmExecutorService$2.call(CpsVmExecutorService.java:47)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at hudson.remoting.SingleLaneExecutorService$1.run(SingleLaneExecutorService.java:112)
at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

引起：发生的异常：     在当地的本地人     在现场父母     在现场来电者     在现场e     在实地计划     在字段线程中     在对象org.jenkinsci.plugins.workflow.cps.CpsThreadGroup@4f76de19

所以经过一些阅读后，似乎Set不可序列化？如果是这种情况，我怎么才能拥有一个仅包含唯一值的ArrayList并拒绝重复的条目？

1 个答案:

答案 0 :(得分：2)

好吧，在添加完整的堆栈跟踪后，现在看来Matcher是问题，因为它不可序列化

您检查了this吗？

我决定：

  

你会注意到一个问题：

     

java.io.NotSerializableException：java.util.regex.Matcher 发生这种情况   因为匹配器局部变量属于类型（匹配器）而不是   被Java认为是可序列化的。由于管道必须在詹金斯生存   重新启动，定期保存正在运行的程序的状态   磁盘，以便以后可以恢复（保存发生在每一步或之后）   中间的步骤，如sh）。   ...

查看链接以获取更多信息 帖子建议使用注释@NonCPS作为声明Matcher的方法。因为我再次询问：

  

这种方法将被Pipeline引擎视为“本机”，并且   它的局部变量从未保存

前，

@NonCPS
public void doSomeWork(){
    ArrayList<String> mystats = new ArrayList<>(array.length);
    for(int i =0; i < array.length; i++) {
        Pattern pattern = Pattern.compile("^\\w{7}\\s(MYSTATS-|mystats-)");
        Matcher matcher = pattern.matcher(array[i]);
        if(matcher.find()) {
            mystats.add(array[i]) 
        }
    }
}

和使用Matcher

的代码的第二部分相同

基于您发布的答案，使用瞬态的其他解决方案 您必须声明方法中的Matcher才能使用transient我不确定您的代码的上下文，或者您是否可以声明Matcher并在以后使用它，例如：

transient Matcher matcher = null;

def commits = sh script: """ git log ${previous_tag}..HEAD --oneline --decorate""", returnStdout: true
def array = commits.split("\\n");

ArrayList<String> mystats = new ArrayList<>(array.length);
for(int i =0; i < array.length; i++) {
    Pattern pattern = Pattern.compile("^\\w{7}\\s(MYSTATS-|mystats-)");
    matcher = pattern.matcher(array[i]);
    if(matcher.find()) {
        mystats.add(array[i]) 
    }
}

和代码的第二部分相同，除非它们在同一个类（范围）中，否则无需重新声明Matcher

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